Background The field of bioethics has evolved over the past half-century, incorporating new domains of inquiry that signal developments in health research, clinical practice, public health in its broadest sense and more recently sensitivity to the interdependence of global health and the environment. These extensions of the reach of bioethics are a welcome response to the growth of global health as a field of vital interest and activity. Methods This paper provides a critical interpretive review of how the term “global (...) health ethics” has been used and defined in the literature to date to identify ethical issues that arise and need to be addressed when deliberating on and working to improve the discourse on ethical issues in health globally. Results Selected publications were analyzed by year of publication and geographical distribution, journal and field, level of engagement, and ethical framework. Of the literature selected, 151 articles were written by authors in high-income countries, as defined by the World Bank country classifications, 8 articles were written by authors in low- or middle-income countries, and 13 articles were collaborations between authors in HIC and LMIC. All of the articles selected except one from 1977 were published after 1998. Literature on global health ethics spiked considerably from the early 2000s, with the highest number in 2011. One hundred twenty-seven articles identified were published in academic journals, 1 document was an official training document, and 44 were chapters in published books. The dominant journals were the American Journal of Bioethics, Developing World Bioethics, and Bioethics. We coded the articles by level of engagement within the ethical domain at different levels: interpersonal, institutional, international, and structural. The ethical frameworks at use corresponded to four functional categories: those examining practical or narrowly applied ethical questions; those concerned with normative ethics; those examining an issue through a single philosophical tradition; and those comparing and contrasting insights from multiple ethical frameworks. Conclusions This critical interpretive review is intended to delineate the current contours and revitalize the conversation around the future charge of global health ethics scholarship. (shrink)

The field of bioethics has evolved over the past half-century, incorporating new domains of inquiry that signal developments in health research, clinical practice, public health in its broadest sense and more recently sensitivity to the interdependence of global health and the environment. These extensions of the reach of bioethics are a welcome response to the growth of global health as a field of vital interest and activity. This paper provides a critical interpretive review of how the term “global health ethics” (...) has been used and defined in the literature to date to identify ethical issues that arise and need to be addressed when deliberating on and working to improve the discourse on ethical issues in health globally. Selected publications were analyzed by year of publication and geographical distribution, journal and field, level of engagement, and ethical framework. Of the literature selected, 151 articles were written by authors in high-income countries, as defined by the World Bank country classifications, 8 articles were written by authors in low- or middle-income countries, and 13 articles were collaborations between authors in HIC and LMIC. All of the articles selected except one from 1977 were published after 1998. Literature on global health ethics spiked considerably from the early 2000s, with the highest number in 2011. One hundred twenty-seven articles identified were published in academic journals, 1 document was an official training document, and 44 were chapters in published books. The dominant journals were the American Journal of Bioethics, Developing World Bioethics, and Bioethics. We coded the articles by level of engagement within the ethical domain at different levels: interpersonal, institutional, international, and structural. The ethical frameworks at use corresponded to four functional categories: those examining practical or narrowly applied ethical questions; those concerned with normative ethics; those examining an issue through a single philosophical tradition; and those comparing and contrasting insights from multiple ethical frameworks. This critical interpretive review is intended to delineate the current contours and revitalize the conversation around the future charge of global health ethics scholarship. (shrink)

The field of bioethics has evolved over the past half-century, incorporating new domains of inquiry that signal developments in health research, clinical practice, public health in its broadest sense and more recently sensitivity to the interdependence of global health and the environment. These extensions of the reach of bioethics are a welcome response to the growth of global health as a field of vital interest and activity. This paper provides a critical interpretive review of how the term “global health ethics” (...) has been used and defined in the literature to date to identify ethical issues that arise and need to be addressed when deliberating on and working to improve the discourse on ethical issues in health globally. Selected publications were analyzed by year of publication and geographical distribution, journal and field, level of engagement, and ethical framework. Of the literature selected, 151 articles were written by authors in high-income countries, as defined by the World Bank country classifications, 8 articles were written by authors in low- or middle-income countries, and 13 articles were collaborations between authors in HIC and LMIC. All of the articles selected except one from 1977 were published after 1998. Literature on global health ethics spiked considerably from the early 2000s, with the highest number in 2011. One hundred twenty-seven articles identified were published in academic journals, 1 document was an official training document, and 44 were chapters in published books. The dominant journals were the American Journal of Bioethics, Developing World Bioethics, and Bioethics. We coded the articles by level of engagement within the ethical domain at different levels: interpersonal, institutional, international, and structural. The ethical frameworks at use corresponded to four functional categories: those examining practical or narrowly applied ethical questions; those concerned with normative ethics; those examining an issue through a single philosophical tradition; and those comparing and contrasting insights from multiple ethical frameworks. This critical interpretive review is intended to delineate the current contours and revitalize the conversation around the future charge of global health ethics scholarship. (shrink)

Peer review is a widely accepted instrument for raising the quality of science. Peer review limits the enormous unstructured influx of information and the sheer amount of dubious data, which in its absence would plunge science into chaos. In particular, peer review offers the benefit of eliminating papers that suffer from poor craftsmanship or methodological shortcomings, especially in the experimental sciences. However, we believe that peer review is not always appropriate for the evaluation of controversial hypothetical science. We argue that (...) the process of peer review can be prone to bias towards ideas that affirm the prior convictions of reviewers and against innovation and radical new ideas. Innovative hypotheses are thus highly vulnerable to being “filtered out” or made to accord with conventional wisdom by the peer review process. Consequently, having introduced peer review, the Elsevier journal Medical Hypotheses may be unable to continue its tradition as a radical journal allowing discussion of improbable or unconventional ideas. Hence we conclude by asking the publisher to consider re-introducing the system of editorial review to Medical Hypotheses. (shrink)

Machine generated contents note: Preface; Introduction; Part I. Global Health, Definitions and Descriptions: 1. What is global health? Solly Benatar and Ross Upshur; 2. The state of global health in a radically unequal world: patterns and prospects Ron Labonte and Ted Schrecker; 3. Addressing the societal determinants of health: the key global health ethics imperative of our times Anne-Emmanuelle Birn; 4. Gender and global health: inequality and differences Lesley Doyal and Sarah Payne; 5. Heath systems and health Martin McKee; (...) Part II. Global Health Ethics, Responsibilities and Justice: Some Central Issues: 6. Is there a need for global health ethics? For and against David Hunter and Angus Dawson; 7. Justice, infectious disease and globalisation Michael Selgelid; 8. International health inequalities and global justice: toward a middle ground Norman Daniels; 9. The human right to health Jonathan Wolff; 10. Responsibility for global health? Allen Buchanan and Matt DeCamp; 11. Global health ethics: the rationale for mutual caring Solly Benatar, Abdallah Daar and Peter Singer; Part III. Analyzing Some Reasons for Poor Health: 12. Trade and health: the ethics of global rights, regulation and redistribution Meri Koivusalo; 13. Debt, structural adjustment and health Jeff Rudin and David Sanders; 14. The international arms trade and global health Salahaddin Mahmudi-Azer; 15. Allocating resources in humanitarian medicine Samia Hurst, Nathalie Mezger and Alex Mauron; 16. International aid and global health Anthony Zwi; 17. Climate change and health: risks and inequities Sharon Friel, Colin Butler and Anthony McMichael; 18. Animals, the environment and global health David Benatar; 19. The global crisis and global health Stephen Gill and Isabella Bakker; Part IV. Shaping the Future: 20. Health impact fund: how to make new medicines accessible to all Thomas Pogge; 21. Biotechnology and global health Hassan Masun, Justin Chakma and Abdallah Daar; 22. Food security and global health Lynn McIntyre and Krista Rondeau; 23. International taxation Gillian Brock; 24. Global health research: changing the agenda Tikki Pang; 25. Justice and research in developing countries Alex John London; 26. Values in global health governance Kearsley Stewart, Gerald T. Keusch and Arthur Kleinman; 27. Poverty, distance and two dimensions of ethics Jonathan Glover; 28. Teaching global health ethics James Dwyer; 29. Towards a new common sense: the need for new paradigms of global health Isabella Bakker and Stephen Gill; Index. (shrink)

Interest in the ethics of research on human subjects, stimulated by atrocious human experimentation during WWII and the resultant Nuremberg Code, has been sustained by examples of unethical research in many countries and by proliferation of codes and guidelines. Such interest has intensified in recent years in association with expanding international collaborative research endeavors. The ongoing controversy in international research ethics takes place at two levels. At the practical level it is about the competing concerns of those predominantly interested in (...) doing research to advance knowledge and those who, while supporting the need for research, are more acutely aware of the potential to exploit vulnerable participants, especially in developing countries. At the level of theory the controversy pits ethical universalism against moral relativism.In her recent review of agreements and controversies in international research ethics, Ruth Macklin has concluded that, despite seeming agreement on several issues, many different viewpoints persist. In her view it is unlikely that these will be resolved easily. (shrink)

Interest in the ethics of research on human subjects, stimulated by atrocious human experimentation during WWII and the resultant Nuremberg Code, has been sustained by examples of unethical research in many countries and by proliferation of codes and guidelines. Such interest has intensified in recent years in association with expanding international collaborative research endeavors. The ongoing controversy in international research ethics takes place at two levels. At the practical level it is about the competing concerns of those predominantly interested in (...) doing research to advance knowledge and those who, while supporting the need for research, are more acutely aware of the potential to exploit vulnerable participants, especially in developing countries. At the level of theory the controversy pits ethical universalism against moral relativism.In her recent review of agreements and controversies in international research ethics, Ruth Macklin has concluded that, despite seeming agreement on several issues, many different viewpoints persist. In her view it is unlikely that these will be resolved easily. (shrink)

Medical practitioners have traditionally seen themselves as part of an international community with shared and unifying scientific and ethical goals in the treatment of disease, the promotion of health, and the protection of life. This shared mission is underpinned by explicit acceptance of traditional concepts of medical morality, and by an implied link between individual human rights and the ethics of medical practice long enshrined in a range of World Medical Association (WMA) and other medical codes. These have been powerful (...) instruments exhorting individual practitioners to promote health and to defend universal principles in order to protect their patients and the physician-patient relationship even in the face of authoritarian state coercion and imposed national ideologies and policies. There has been widespread support for this approach and this should be intensified. (shrink)

The Ebola epidemic in West Africa is not merely a biomedical problem that can be seen in isolation and dealt with only through emergency medical rescue processes. The ethical dilemmas surfaced by this epidemic are also not confined to the usual micro-ethical problems associated with medical care and medical research. The pandemic, as one of many manifestations of failed human and social development that has brought the world to dangerous ‘tipping points’, requires deep introspection and action to address upstream causal (...) processes. (shrink)

Reviewing works by James Alison, Alistair McFadyen, Andrew Sung Park, Ted Peters, and Solomon Schimmel, the author suggests that the status and function of the discourse/doctrine of sin highlight tensions between theology and ethics in ways that suggest the character, limits, and promise of religious ethics. This literature commends attention to sin-talk because it helps religious ethicists to render more adequately the dynamics of human agency, sociality, and culture and because it raises questions about the nature and task (...) of theology, faith, and morality. Yet these volumes also indicate that religious ethics should pay more attention to particular sins. (shrink)

The progress of history rests on the battle for supremacy of competing ideas.... The power and wealth of western countries give them a dominant role in shaping the international public discourse. This is a privileged position... [an] imbalance of voice in the international discourse [that] has built up a dangerous sense of resentment by the silent majority of the world’s people. The dominant bioethical paradigm that provides the context for research ethics discourse has evolved within western philosophy’s powerful normative framework (...) and is built on a relationship model that explains and underpins the obligations doctors have to their patients. In this one-to-one relationship, the doctor is... (shrink)

Widening disparities in health within and between nations reflect a trajectory of ‘progress’ that has ‘run its course’ and needs to be significantly modified if progress is to be sustainable. Values and a value system that have enabled progress are now being distorted to the point where they undermine the future of global health by generating multiple crises that perpetuate injustice. Reliance on philanthropy for rectification, while necessary in the short and medium terms, is insufficient to address the challenge of (...) economic and other systems spinning out of control. Innovative approaches are required and it is suggested that these could best emerge from in-depth multidisciplinary research supported by endeavours to promote a ‘global mind-set.’. (shrink)

Intense scientific work on HIV/AIDS has led to the development of effective combination drug therapies and there is hope that effective vaccines will soon be produced. However, the majority of people with HIV/AIDS in the world are not benefiting from such advances because of extreme poverty. This article focuses on the pandemic as a reflection of a complex trajectory of social and economic forces that create widening global disparities in wealth and health and concomitant ecological niches for the emergence of (...) new infectious diseases. While the biomedical approach to HIV/AIDS is necessary, has prolonged the lives of many individuals and could offer much at the level of population health, it cannot, in isolation, improve the health of populations. To achieve the latter will require understanding and addressing the deeper social causes of pandemics. Broadening the discourse on ethics to include public health ethics and the ethics of international relations could contribute to reducing the impact of the pandemic and to preventing the emergence of new infectious diseases in the future. (shrink)

It is widely acknowledged that the HIV and AIDS pandemic is a global emergency and that cheap, effective treatment should be provided for as many people as possible worldwide. But there are many challenges to rolling out antiretroviral treatment in resource-poor settings. These include the cost of drugs, sustaining their supply and distribution, the complexity of treatment regimens, selection of patients for treatment, shortage of medical and nursing personnel, inadequacy of healthcare facilities, the need for uninterrupted, lifelong treatment, and monitoring (...) for drug resistance. Great efforts, nationally and internationally, are required to meet these challenges. (shrink)

Offers theoretical and practical guidance for addressing global health, and a deeper understanding of the challenges humanity faces.

ABSTRACT A major focus within the modern bioethics debate has been on reshaping power relationships within the doctor–patient relationship. Empowerment of the vulnerable has been achieved through an emphasis on human rights and respect for individual dignity. However, power imbalances remain pervasive within healthcare. To a considerable extent this relates to insufficient attention to social injustice. Such power imbalances together with the development of new forms of power, for example through new genetic biotechnology, raise the spectre of increasing social injustice. (...) Attention will be drawn to the need to extend the bioethics debate to include ethical considerations regarding public health. Changes in political philosophy will also be required to reshape international power relations and improve population health. (shrink)

Clinical research has become a burgeoning activity in recent years, largely stimulated by the pharmaceutical industry's interest in new drugs with high marketing profiles. Several other forces fuel this thrust: the increasing dependence of academic medical institutions on research funding from industry; the need for large, efficient multicenter trials to obtain reliable and statistically significant results in the shortest possible time for drug registration purposes; and access to research subjects in countries. The intense interest in HIV/AIDS research and recent controversies (...) about revisions to the Helsinki Declaration, which have been seen by some to be motivated by the desire to facilitate exploitative research in countries, have stimulated renewed interest in the ethics of clinical research. (shrink)

At the onset of the COVID-19 pandemic in the United States, stay-at-home orders disrupted normal research operations. Principal investigators (PIs) had to make decisions about conducting and staffing essential research under unprecedented, rapidly changing conditions. These decisions also had to be made amid other substantial work and life stressors, like pressures to be productive and staying healthy. Using survey methods, we asked PIs funded by the National Institutes of Health and the National Science Foundation (N = 930) to rate how (...) they prioritized different considerations, such as personal risks, risks to research personnel, and career consequences, when making decisions. They also reported how difficult they found these choices and associated symptoms of stress. Using a checklist, PIs indicated those factors in their research environments that made their decisions easier (i.e., facilitators) or more difficult (i.e., barriers) to make. Finally, PIs also indicated how satisfied they were with their decisions and management of research during the disruption. Descriptive statistics summarize PIs’ responses and inferential tests explore whether responses varied by academic rank or gender. PIs overall reported prioritizing the well-being and perspectives of research personnel, and they perceived more facilitators than barriers. Early-career faculty, however, rated concerns about their careers and productivity as higher priorities compared to their senior counterparts. Early-career faculty also perceived greater difficulty and stress, more barriers, fewer facilitators, and had less satisfaction with their decisions. Women rated several interpersonal concerns about their research personnel more highly than men and reported greater stress. The experience and perceptions of researchers during the COVID-19 pandemic can inform policies and practices when planning for future crises and recovering from the pandemic. (shrink)

In meeting the challenges of fashioning a new health care system, South Africa stands poised to contribute to a better future for its own citizens and the subcontinent.

In meeting the challenges of fashioning a new health care system, South Africa stands poised to contribute to a better future for its own citizens and the subcontinent.

Can you think of a meme that made you laugh or a political post that made you angry? These examples illustrate how social media use (SMU) impacts how people feel. Similarly, how people feel when they initiate SMU may impact the emotional effects of SMU. Someone feeling happy may feel more positively during SMU, whereas someone feeling sad may feel more negatively. Using an experimental design, we examined whether following SMU, those in a happy mood would experience increases in positive (...) affect (PA) and those in a sad mood would experience increases in negative affect (NA). A large sample of college students (N = 703) were randomly assigned to a happy, sad, or neutral mood induction before SMU. PA and NA were assessed at baseline, post-mood induction, and after SMU. Contrary to hypotheses, after SMU, people in happy moods experienced decreases in PA, and those in sad moods experienced decreases in NA, reflecting SMU having a dampening effect on emotions. PA and NA were significantly lower after SMU compared to baseline and did not vary by condition. How young adults feel when they log onto SMU matters in understanding how SMU impacts PA and NA, but on average, emotional experiences are dampened. (shrink)

Given the fragility of individual and population wellbeing in an interdependent world threatened by many overlapping crises, the suggestion is made that new legal mechanisms have the robust potential to reduce human vulnerability locally and globally.

The most common response to the challenge of protecting health through law is to focus on protecting the rights of vulnerable individuals and to enhance their access to health care. Each one of us is vulnerable or potentially vulnerable because of the fragile, existential nature of the human condition. Catastrophic and unexpected events could instantaneously transform us from a state of total independence and potential vulnerability to one of extreme vulnerability and complete dependence. Some legal provisions have the potential to (...) provide a modicum of protection when we find ourselves in those situations. There are also legal provisions that contribute to beneficial social circumstances; for example, legislation enabling universal access to medical care, and operationalizing respect for the individual’s right to health care, as advocated for by other authors in this issue. (shrink)

At this crucial time, on the centenary of major reforms, we invite all concerned stakeholders to join us in much needed rethinking for reforms of professional education in the 21st century. . . . All health professionals in all countries should be educated to mobilise knowledge and to engage in critical reasoning and ethical conduct so that they are competent to participate in patient and population-centred health systems as members of locally responsive and globally connected teams. What this Commission argues (...) for is nothing less than a remoralisation of health professionals’ education. For decades, health professionals have colluded with centres of power (governmental, commercial, institutional, even .. (shrink)

A new context for ethics and ethics education is evident in a rapidly changing world and our threatened planet. The current focus on considerations of inter-personal ethics within an anthropocentric perspective on life should be extended to embrace considerations of global and ecological ethics within an eco-centric perspective on global and planetary health. The pathway to understanding and adapting to this new context includes promoting shifts in life styles from selfish hyper-individualism and wasteful consumerism towards cautious use of limited resources (...) within an increasingly interdependent world in which the equal moral worth of all and sustainability are valued. Critical scholarly approaches to global politics and to the global political economy could facilitate such change and encourage iterative interactive processes instead of seeking conclusive definitive ‘scientific’ solutions to all problems. Hopefully this shift in perspective could be achieved firstly through sensitization to new and increasingly challenging ethical dilemmas, and then by encouraging rational thinking and action based on global and ecological considerations rather than on false economic dogma and the distorted workings of a market civilization. Moving ahead with these activities must begin with promotion of education, learning and self-reflection to foster the widespread development of a global state of mind. Such a shift would require an expanded ethical discourse, with consideration of ethical dilemmas beyond human inter-personal relationships. These should include intra-institutional and inter-institutional relationships, as well as relational ethics between nations in a post-Westphalian world, and between humans and nature in an era now called the Anthropocene, to ensure survival on a planet undergoing entropy.The adverse effects of intense competition could be reduced by encouraging greater cooperation, linking security issues to global health and social justice issues, and using inspirational narratives and examples of moral imagination/moral leadership. These educational programs should be initiated in schools and become mandatory for all first-year College and University students. Such an agenda is feasible given human ingenuity, determination, resilience and adequate resources, but will also require political and social will as its drivers. (shrink)

Since the early 20th century, bioethics in South Africa has moved through several stages, responding to the same forces and developments as elsewhere, for example in the United Kingdom and United States. In addition, some unique developments in South Africa, for example the death of Steve Biko, the HIV/AIDS pandemic, and a peaceful transition to democracy with increased focus on human rights have given bioethics in South Africa its own dimension. Bioethics in South Africa reflects the general concerns of the (...) field elsewhere, but it also stands at the intersection of the concerns of both developed and developing worlds. Thus, issues such as resource allocation, HIV/AIDS, and medical research take on an urgency and character that reflect South Africa's particular historical, geographical, and social conditions. (shrink)

Social justice has strong historical roots in public health. This does not mean that we always understand what it entails when conducting an ethical analysis of a particular public health program. This article shows that Powers and Faden’s theory of social justice can provide important insights and nuance to such an analysis. The Ontario human papilloma virus vaccination program that is underway in Canada provides an important and timely case where we can surface ethical issues pertaining to social justice that (...) may otherwise remain unarticulated in the context of this program. This analysis focuses on the normative issues raised by the prioritization of a school-based program for girls only. It also examines the relevant domains of well-being identified in Powers and Faden’s theory to see whether the program is likely to enhance the well-being of those for whom it is most important. Finally, the role of vaccines in general in promoting well-being is discussed. (shrink)

This series of responses was commissioned to accompany the article by Singer et al, which can be found at http://www.biomedcentral.com/1472-6939/2/1. If you would like to comment on the article by Singer et al or any of the responses, please email us on [email protected].

A major strength of this capacity building programme is that it encourages cross-cultural considerations in the application of research ethics principles to research in developing countries.

A number of high‐profile ethical dilemmas are embedded in the emerging topic of global health. The three books under review here provide various lenses through which to view them. In Ethics in Global Health: Research, Policy, and Practice, Ruth Macklin offers finely honed contemporary arguments and applies them to the future. Global Justice and Bioethics, a collection of essays edited by Joseph Millum and Ezekiel Emanuel, focuses on theories of justice, and in Long‐term Care, Globalization and Justice, Lisa Eckenwiler looks (...) more broadly at the global implications of caring for the aged in wealthy societies. (shrink)

Police officers around the world must often select between equally unappealing, uncertain courses of action in an attempt to achieve the best outcome. Despite the immense importance of such decisions, there remains a lack of understanding in the study of individual differences in police decision-making. Here, using a sample of senior police officers recruited from decision-making training events across the United Kingdom (n = 96), we used the Least-worst Uncertain Choice Inventory For Emergency Responses (LUCIFER) to measure the effect of (...) maximization on both domain-specific (police) and domain-general (military) decisions. In line with a wealth of research on traditional “consumer” decisions, we found that police officers who were “maximizers” found decisions more difficult. Gender and previous military experience also influenced the process of decision-making. Specifically, police officers with military experience took more time to assess the situation but were faster to choose a course of action and commit to it. Female police officers also were slower to assess the situation. As recent events show, the outcomes of police decisions have significant consequences for the public, the officers involved, the police force as a whole, and the wider population, yet psychological research has yet to fully explore the role of individual differences in how such decisions are made. While this study does not seek to identify factors associated with “good” or “better” decision-makers, it provides strong support for the need to factor in perspectives of the individual when creating theory, or applied tools, in support of police decision-making. (shrink)

The term “industrial action” includes any noncooperation with management, such as strict “working to rule,” refusal of certain duties, going slow, and ultimately withdrawal of labor. The latter form of action, striking, has posed particular problems for professional ethics, especially in those professions that provide healthcare, because of the potential impact on patients' well-being. Examination of the issues, however, displays a difference in response between the healthcare professions, in particular between doctors and nurses. In considering the ethics of industrial (especially (...) strike) action there are various aspects of professional ethics to consider: (1) whether there is a tension between industrial action and the very notion of professional ethics; (2) what specific issues arise in the case of healthcare professions; (3) what, if anything, can explain and/or justify different responses from the medical and nursing professions? (shrink)

Drug regulatory bodies aim to ensure that patients have access to safe and effective drugs; however, no matter the quality of pre-licensure studies, uncertainty will remain regarding the safety and effectiveness of newly approved drugs until a large and diverse population uses those drugs. Recent analyses of Canada’s post-market drug surveillance system have found that Canada is not keeping pace with international requirements for PMDS, and have noted that efforts must be improved to monitor and address the safety and effectiveness (...) of approved drugs among vulnerable populations. Given the uncertainty that exists when drugs enter the market, some have suggested that the precautionary principle is relevant to guiding decision-making in this context. This paper responds to recommendations that the Canadian PMDS system should be responsive to the health needs of vulnerable populations by assessing the utility of deploying the precautionary principle to guide a post-market strategy for vulnerable populations. (shrink)