How many people should there be? Can there be overpopulation: too many people living? I shall present a puzzling argument about these questions, show how this argument can be strengthened, then sketch a possible reply.

How many people should there be? Can there be overpopulation: too many people living? I shall present a puzzling argument about these questions, show how this argument can be strengthened, then sketch a possible reply.

Despite substantial evidence pointing to a looming Malthusian catastrophe, governmental measures to reduce population have been opposed both by religious conservatives and by many liberals, especially liberal feminists. Liberal critics have claimed that 'utilitarian' population policies violate a 'fundamental right of reproductive liberty'. This essay argues that reproductive liberty should not be considered a fundamental human right, or certainly not an indefeasible right. It should, instead, be strictly regulated by a global agreement designed to reduce population to a sustainable level. (...) Three major points are discussed: 1) the current state of the overpopulation problem; 2) the claim of a fundamental human right of reproductive liberty; 3) an outline of a global agreement to address overpopulation as a 'tragedy of the commons'. (shrink)

A few decades ago, there was a lively debate on the problem of overpopulation. Various proposals to limit population growth and to control fertility were made and debated both in academia and in th...

This article is a contribution to overpopulation discourse in environmental ethics. It is based on the hypothesis that, even though the idea and reasoning behind Garret Hardin’s lifeboat metaphor are crucial within the current environmental crisis, from an African perspective, the metaphor raises a number of questions. The article argues that the lifeboat metaphor poses an ethical challenge to most communities particularly in Africa because it runs contrary to their political and cultural worldview. I advance two central claims in (...) the framework of insights from an African worldview. First, the ethics behind the lifeboat metaphor is deeply dependent upon political power differentials, particularly between affluent and poor nations. Second, the metaphor fails to take into consideration the cultural understanding of population in Africa. (shrink)

This book examines the link between population growth and environmental impact and explores the implications of this connection for the ethics of procreation. In light of climate change, species extinctions, and other looming environmental crises, Trevor Hedberg argues that we have a collective moral duty to halt population growth to prevent environmental harms from escalating. This book assesses a variety of policies that could help us meet this moral duty, confronts the conflict between protecting the welfare of future people and (...) upholding procreative freedom, evaluates the ethical dimensions of individual procreative decisions, and sketches the implications of population growth for issues like abortion and immigration. It is not a book of tidy solutions: Hedberg highlights some scenarios where nothing we can do will enable us to avoid treating some people unjustly. In such scenarios, the overall objective is to determine which of our available options will minimize the injustice that occurs. This book will be of great interest to those studying environmental ethics, environmental policy, climate change, sustainability, and population policy. (shrink)

Many philosophers of action afford intentions a central role in theorizing about action and its explanation. Furthermore, current orthodoxy in the philosophy of action has it that intentions play a causal role with respect to the etiology and explanation of action. But action theory is not without its heretics. Some philosophers have challenged the orthodox view. In this paper I examine and critique one such challenge. I consider David-Hillel Ruben's case against the need for intentions to play a causal role (...) in the etiology and explanation of mental actions. Contra Ruben, I defend the orthodox view that intentions play an indispensable causal and explanatory role with respect to mental actions. (shrink)

Projects of radical life extension have been discussed amongst scientists for years. Some bioethicists express reservations about this endeavor. A common objection appeals to demography: if the human lifespan is dramatically expanded, humanity would face an overpopulation problem. In this essay, the authors reply to this objection. They posit that radical life extension is unlikely to lead to overpopulation because overpopulation is determined more by fertility rates than by longevity, and as a result of the advanced phases (...) of industrialization, fertility rates are likely to be reduced, and therefore, population size would become stable. However, they argue that although overpopulation is not a concern for the foreseeable future, it is still important to acknowledge its potential harms. Finally, they argue that even if overpopulation becomes a problem caused by radical life extension, there are plausible ways to solve it. (shrink)

Some of the objections to life-extension stem from a concern with overpopulation. I will show that whether or not the overpopulation threat is realistic, arguments from overpopulation cannot ethically demand halting the quest for, nor access to, life-extension. The reason for this is that we have a right to life, which entitles us not to have meaningful life denied to us against our will and which does not allow discrimination solely on the grounds of age. If the (...) threat of overpopulation creates a rights conflict between the right to come into existence, the right to reproduce, the right to more opportunities and space , and the right to life, the latter ought to be given precedence. (shrink)

It is an open question when procreation is justified. Antinatalists argue that bringing a new individual into the world is morally wrong, whereas pronatalists say that creating new life is morally good. In between these positions lie attempts to provide conditions for when taking an anti or pronatal stance is appropriate. This paper is concerned with developing one of these attempts, which can be called qualified pronatalism. Qualified pronatalism typically claims that while procreation can be morally permissible, there are constraints (...) on when it is justified. These constraints often concern whether an individual is motivated to procreate for the right reasons. For instance, if someone is not sufficiently concerned with the child’s future welfare, the qualified pronatalist will say that procreation is not justified. Moreover, David Wasserman says that this concern forms a role-based duty. That is, prospective parents have special duties to be concerned for the child’s future welfare by virtue of the role they occupy. In this paper, I argue that a proper examination of a prospective parent’s role-based duties entails that more is needed to justify procreation. Bringing a new person into the world leaves fewer resources for people who already need them, and the current size of the human population is unsustainable from a planetary point of view. Therefore, even if there is nothing wrong with procreation per se, the external condition of overpopulation, and its ensuing public health issues, plausibly gives rise to a role-based duty that prospective parents must account for when deciding whether to procreate. (shrink)

One of the main objections to life extension is that life extension will cause severe overpopulation. This objection presents both moral and demographic issues. To explore the demographic issue, we present an updated and improved version of the formula in chapter six of _New Methuselahs_ for projecting the demographic impact of life extension. The new version includes additional demographical factors such as non-aging related causes of death. According to projections generated with this revised formula, moderate life extension (a life (...) expectancy of 120 years) will not significantly increase population at the fertility rates current in the developed world, but radical life expectancy (halting aging completely, leading to an average life expectancy of 1000 years) can lead to severe overpopulation even at very low fertility rates. This formula also enables us to ascertain what fertility rate and birth spacing will prevent life extension from causing severe overpopulation. The moral issues arise if radical life extension causes overpopulation severe enough to outweigh the benefits it brings. _New Methuselahs_ proposed a reproductive policy for avoiding severe overpopulation by limiting reproduction for those who use life extension. We then consider a moral objection to this policy that was not discussed in _New Methuselahs_: it is not likely that society will succeed in imposing limits to reproduction, therefore, it is likely that radical life extension is morally wrong. We respond to this objection and defend our response against two further objections. (shrink)

The world's population is a significant variable that can be altered to help decrease global emissions. Most of the discussion surrounding this variable has concentrated on the moral issues involved: to what extent is a state justified in reducing its population? Are individual procreators morally obligated to have fewer children? However, while these moral concerns are important, little attention has been given to the feasibility of a proposed solution to overpopulation. This article aims to rectify that. By understanding whether (...) (and how) feasibility impacts the truth-value of an ought claim, important progress can be made on deliberating what to do about overpopulation. In Section 2, I outline the public health crisis that overpopulation causes and present Sarah Conly's argument as the most well-thought-out account of how to ethically and rapidly reduce the population. In Section 3, I borrow from Nicholas Southwood to explore when infeasibility makes an ought claim false. In Section 4, I show that rapidly reducing the population is infeasible. Therefore, regardless of any ethical merits, it should be eliminated as an option when deliberating what to do. Instead, we must put our time and resources into finding a feasible solution to overpopulation. (shrink)

The world's population is a significant variable that can be altered to help decrease global emissions. Most of the discussion surrounding this variable has concentrated on the moral issues involved: to what extent is a state justified in reducing its population? Are individual procreators morally obligated to have fewer children? However, while these moral concerns are important, little attention has been given to the feasibility of a proposed solution to overpopulation. This article aims to rectify that. By understanding whether (...) (and how) feasibility impacts the truth-value of an ought claim, important progress can be made on deliberating what to do about overpopulation. In Section 2, I outline the public health crisis that overpopulation causes and present Sarah Conly's argument as the most well-thought-out account of how to ethically and rapidly reduce the population. In Section 3, I borrow from Nicholas Southwood to explore when infeasibility makes an ought claim false. In Section 4, I show that rapidly reducing the population is infeasible. Therefore, regardless of any ethical merits, it should be eliminated as an option when deliberating what to do. Instead, we must put our time and resources into finding a feasible solution to overpopulation. (shrink)

The world's population is a significant variable that can be altered to help decrease global emissions. Most of the discussion surrounding this variable has concentrated on the moral issues involved: to what extent is a state justified in reducing its population? Are individual procreators morally obligated to have fewer children? However, while these moral concerns are important, little attention has been given to the feasibility of a proposed solution to overpopulation. This article aims to rectify that. By understanding whether (...) (and how) feasibility impacts the truth-value of an ought claim, important progress can be made on deliberating what to do about overpopulation. In Section 2, I outline the public health crisis that overpopulation causes and present Sarah Conly's argument as the most well-thought-out account of how to ethically and rapidly reduce the population. In Section 3, I borrow from Nicholas Southwood to explore when infeasibility makes an ought claim false. In Section 4, I show that rapidly reducing the population is infeasible. Therefore, regardless of any ethical merits, it should be eliminated as an option when deliberating what to do. Instead, we must put our time and resources into finding a feasible solution to overpopulation. (shrink)

Some of the causes of the 'sexual revolution' during the past few decades are widely known: The development of relatively safe and reliable contraceptives, especially the birth-control pill; the 'morning after' pill; antibiotics to relieve or cure sexually transmitted diseases such as gonorrhea, herpes, and syphilis; the increased social acceptance of pre-marital sex, homosexuality, and other behaviors that formerly were considered deviant; and the legalization of abortion as the ultimate 'contraceptive'. But little attention has been paid to two rather cerebral (...) factors relevant to these developments – namely, ethical theories, and theories of overpopulation. In this paper I will argue that these two less well-known and more subtle factors have been at least as powerful as the more obvious factors mentioned above, in bringing about sea-changes in sexual mores. More specifically, I will argue that some implicit approaches to ethical theory are more conducive than others to bringing about the present status quo in sexual mores, and that the widespread belief in world overpopulation has not only changed the moral climate regarding sexuality, but has helped to redefine what is moral and what is immoral. (shrink)

This paper responds to Theron Pummer’s distinction between Sorites arguments and repugnant conclusion arguments by presenting a Sorites overpopulation argument. Also I present a Sorites argument in favour of myths of genius.

During the eighteenth century, the discovery of sexual reproduction in insect species prompted the demise of spontaneous generation and new developments in natural history, theology, and political economy. The sexual lives of insects prompted debates on whether insects were governed by desire, free will, and even marital tendency. Fuelled by the democratisation of microscopy, early modern entomology took a new turn and breadth: the study of insects and of their sexual lives provided unexpected new insights into human sexuality, reproduction, and (...) Malthusian fears of overpopulation. This article surveys the intellectual culture of entomology and natural history during the crucial decades when entomologists worked to quantify the reproductive capacities of insect species. Assessing the influences these entomological works had within political economy and theology, we argue that the sexual lives of insects − once analysed and delineated − influenced familiar ideological features of the intellectual landscape of the late Enlightenment, particularly in the theological philosophies of northern Europe and in the political economy of population in Britain. (shrink)

Reply to Stanley Warner's response in Environmental Values 13.3 to the article by Carol Kates in Environmerntal Values 13.1.

Travis Rieder's Toward a Small Family Ethic confronts the effects of population growth and addresses what individual procreative obligations might follow from it. In this review, I summarize the main arguments that Rieder deploys to defend his position that those with large ecological footprints morally ought to follow a small family ethic. I express sympathy with some of his claims and praise the book's accessibility, but its short length inevitably means that some important issues are omitted or given only superficial (...) treatment. I highlight a few of those issues at the end of the review. (shrink)

Biological studies have demonstrated that it is possible to slow the ageing process and extend lifespan in a wide variety of organisms, perhaps including humans. Making use of the findings of these studies, this article examines two problems concerning the effect of life extension on population size and welfare. The first—the problem of overpopulation—is that as a result of life extension too many people will co-exist at the same time, resulting in decreases in average welfare. The second—the problem of (...) underpopulation—is that life extension will result in too few people existing across time, resulting in decreases in total welfare. I argue that overpopulation is highly unlikely to result from technologies that slow ageing. Moreover, I claim that the problem of underpopulation relies on claims about life extension that are false in the case of life extension by slowed ageing. The upshot of these arguments is that the population problems discussed provide scant reason to oppose life extension by slowed ageing. (shrink)

Constitution theorists have argued that due to a difference in persistence conditions, persons are not identical with the animals or the bodies that constitute them. A popular line of objection to the view that persons are not identical with the animals/bodies that constitute them is that the view commits one to undesirable overpopulation, with too many minds and too many thinkers. Constitution theorists are well aware of these overpopulation concerns and have gone a long way toward answering them. (...) However, there is one mental excess worry that remains especially problematic. It is argued here that the worry about too many thoughts, or too many instantiations of mentality in general, remains a serious threat to the constitution view of persons. What exactly the threat is and how it arises is described in detail in Section III. It is then shown that attempts to allay the concern are unsuccessful. I argue, in particular, that appealing to the distinction between derivative and non-derivative instantiation fails to solve the problem. (shrink)

Overpopulation is often identified as one of the key drivers of climate change. Further, it is often thought that the mechanism behind this is obvious: 'more people means more greenhouse gas emissions'. However, in light of the fact that climate change depends most closely on cumulative emissions rather than on emissions rates, the relationship between population size and climate change is more subtle than this. Reducing the size of instantaneous populations can fruitfully be thought of as spreading out a (...) fixed number of people more thinly over time, and (in light of the significance of cumulative emissions) it is not immediately clear whether or how such a 'spreading' would help with climate change. To bring the point into sharp relief, I first set out a simple model according to which population reduction would not lead to any climate-change-related improvement. I then critically examine the assumptions of the model. If population reduction would lead to a significant climate-change-related improvement, this must be because (i) population reduction would significantly reduce even cumulative emissions, and/or (ii) climate damages are, to a significant extent, driven by the pace of climate change, and not only the eventual extent of the change. (shrink)

Overpopulation, overexploitation of natural resources, overconsumerism, the predictions of environmental experts do not bode well for us.

'Overpopulation' is often implicated as a major causative factor of poverty and environmental degradation in the developing world. This review of the population-resource debate focusses on Red, Green and neo-Malthusian ideologies to demonstrate how they have ramified into current economic and development theory. A central hypothesis is that key elements of Marxist analysis, tempered by the best of Green thought, still have much to offer the subject. The contributions of capitalism to 'underdevelopment', and its associated environmental crises, are clarified (...) and reasserted in a contemporary context. The concept of valuation vector is also introduced, and a novel closure of Blaikie's 'Chain of Explanation' is proposed. The Circuit of Capital model thus created is applied to specific case-studies of resource-population conflict so as to overturn the simplistic conventional connection held between population growth and ecological devastation. The model highlights sequential causes of poverty arising from important capital-based factors which might otherwise be overlooked. It can accommodate a variety of Red-Green perspectives and its structural form is suited to the unravelling of complex population-resource pressures in the multi-dimensional space of the modern global political economy. (shrink)

The overpopulation of the earth and the increasing consumption of its life ressources implies new risks and damages for mankind. The awareness of this facts has turned Ethics, formerly conceived of primarily as one among other philosophical disciplines, into a fundamental one. Ethics has become, in some sense, a “first philosophy”.This has opened new object fields for it. In the past Ethics was mainly concerned with the “good” life and the “good” behavior of the single subject. Now it aims (...) to support behavior kinds making possible the survival of mankind under globalized life conditions. “Good” life presupposes surviving.Ethical reflections aimed formerly to guarantee that human beings keep able to live together even if they don’t share the same “values”. Now they have to face the problem of the living together of human beings belonging to different cultures and social forms. The main question is no more what ethical fundamentals would best enable human beings to live together, but what are the conditions for a coexistence of values which enables a good living together of human beings with diverse ethical orientations.Often it is said that Hegel did not develop an Ethics of his own. This paper would like to show that Hegel’s philosophy is, on the contrary, an excellent tool for facing such kinds of questions. His main ethical concept is “recognition”. But he is not concerned with the recognition or rejection of concrete ethical principles. His concept of recognition focuses on the individual in its absolute singularity, in his being absolutely unique in and through himself. His consciousness as self-consciousness gets thus particular in the sense of being definitely individual. Hegel calls the reciprocal recognition of individually conscious subjects the “absolute spirit”.This unusual terminology has made an adequate reception of Hegel’s thinking quite difficult. But there can be no doubt that his very rich and deep elaboration of the phenomenology of such recognition among factual subjects provides extremely productive tools to face eco-ethical reflections in our days. This paper tries to show in presently understandable terms Hegel’s reflections on the very nature of language as the place in which the subjects experience both their absolute individuality and their community, i. e. their singularity and the generality of their institutions, in a simultaneously paradox and coherent way. Recognition becomes in Hegel the inner structure of pardon and reconciliation. Its dependence on languages both diverse and shared makes this concept particularly productive for shaping the living together of human beings belonging to diverse cultures and following diverse ethical orientations. (shrink)

This article examines overpopulation as a basis for historical interpretation. Drawing on the ideas of T.R. Malthus, Elizabeth Kolbert, John Lovelock, Lynn Margulis, and Edward O. Wilson, I make the case that the only concept of ‘progress’ that accurately describes the human enterprise is the uncontrolled growth of population. I explain why a Malthusian/Gaia interpretation is not a historicist or eschatological narrative, like Hegelian idealism, Marxism, fundamentalist religion, or ‘end of history’ neoliberalism. My article also includes a discussion of (...) the ideas and prescriptions of contemporary commentators like physicist, Adam Frank, and the philosophers, John Gray, and Roy Scranton. What makes my article distinctive is bringing together ideas of population theory through a lens of sociobiology and post-humanist philosophy. Through this interpretive synthesis, I form a basis for recasting history as the record of the growing imbalance of our species in light of the unprecedented crises of the environment that are its byproduct. I conclude with the idea that regardless of whether the world is dying or simply going through a fundamental chaotic transformation, the role of the critical-rational historian remains the same: to tell the truth as best as she or he can know it. (shrink)

Humankind is facing many existential global problems that require international and transgenerational efforts to be solved. Preparing our next generation with sufficient knowledge and skills to deal with such problems is imperative. Fortunately, the digital environment provides foundational conditions for children’s and adolescents’ exploration and self-learning, which might help them cultivate the necessary knowledge and skills for future survival. We conducted the Bayesian Mindsponge Framework (BMF) analytics on a dataset of 2069 students from 54 Vietnamese elementary, secondary, and high schools (...) to test this presumption. The results showed that students with higher digital literacy are more curious and have better knowledge regarding global issues (i.e., climate change, disease, overpopulation, aging, etc.). Students’ curiosity also mediates the relationship between digital literacy and global issues knowledge. Based on these findings, we argue that digital explorative space is essential for digital natives’ education for survival, individually (i.e., for future employment requirements) and socially (i.e., for making informed decisions and creating innovations that can be helpful to society). Children’s and adolescents’ exposure to digital explorative space should be promoted to improve their digital literacy rather than prohibition. During the exploration, emotional intelligence is critical in mitigating existential risks, or threats, to digital natives to navigate and overcome chaotic processes occurring in unchartered waters in the virtual world. (shrink)

Transhumanist thought on overpopulation usually invokes the welfare of present human beings and the control over future generation, thus minimizing the need and meaning of new births. Here we devise a framework for a more thorough screening of the relevant literature, to have a better appreciation of the issue of natality. We follow the lead of Hannah Arendt and Brent Waters in this respect. With three overlapping categories of words, headed by “natality,” “birth,” and “intergenerations,” a large sample of (...) books on transhumanism is scrutinized, showing the lack of sustained reflection on the issue. After this preliminary scrutiny, a possible defense of natality in face of modern and transhumanist thought is marshaled, evoking a number of desirable human traits. One specific issue, the impact of modern values on natality, is further explored, reiterating that concerns about overpopulation and enhanced humans should keep in sight the natural cycle of birth and death. (shrink)

Australian prisons are overpopulated with people suffering from numerous health problems. COVID-19 presents a significant threat to prisoner health. This article examines the current regulatory responses from Australian state and territory governments to COVID-19 and a recent case which tested the human rights of prisoners during a pandemic.

This volume collects a wealth of articles covering a range of topics of practical concern in the field of ethics, including active and passive euthanasia, abortion, organ transplants, capital punishment, the consequences of human actions, slavery, overpopulation, the separate spheres of men and women, animal rights, and game theory and the nuclear arms race. The contributors are Thomas Nagel, David Hume, James Rachels, Judith Jarvis Thomson, Michael Tooley, John Harris, John Stuart Mill, Louis Pascal, Jonathan Glover, Derek Parfit, R.M. (...) Hare, Janet Radcliffe Richards, Peter Singer, and Nicholas Measor. (shrink)

Do pregnant mothers have fetuses as parts? According to the “parthood view” they do, while according to the “containment view” they don’t. This paper raises a novel puzzle about pregnancy: if mothers have their fetuses as parts, then wherever there is a pregnant mother, there is also a smaller thinking being that has every part of the mother except for those that overlap with the fetus. This problem resembles a familiar overpopulation puzzle from the personal identity literature, known as (...) the “Thinking Parts Problem”, but it’s not merely a special case of that problem. Rather, the fact that late-term fetuses have a mental life of their own makes the Problem of Pregnant Thinkers, as I will call it, a sui generis and especially recalcitrant problem. (shrink)

The "old" sustainability : a story of listening and harmony -- The 1960s to the present : key conferences and statements -- Rise of the "new" sustainability : the weak and the strong -- Economic sustainability : coming to grips with endless growth -- Ecological sustainability : essential but overlooked -- Social sustainability : utopian dream or practical path to change? -- Overpopulation and overconsumption -- Worldview and ethics in sustainability -- An unsustainable denial -- Appropriate technology for sustainability (...) -- Solutions for sustainability. (shrink)

Much disease and disability is the result of lifestyle behaviours. For example, the contribution of imprudence in the form of smoking, poor diet, sedentary lifestyle, and drug and alcohol abuse to ill-health is now well established. More importantly, some of the greatest challenges facing humanity as a whole – climate change, terrorism, global poverty, depletion of resources, abuse of children, overpopulation – are the result of human behaviour. In this chapter, we will explore the possibility of using advances in (...) the cognitive sciences to develop strategies to intentionally manipulate human motivation and behaviour. While our arguments apply also to improving prudential motivation and behaviour in relation to health, we will focus on the more controversial instance: the deliberate targeted use of biomedicine to improve moral motivation and behaviour. We do this because the challenge of improving human morality is arguably the most important issue facing humankind (Persson and Savulescu, forthcoming). We will ask whether using the knowledge from the biological and cognitive sciences to influence motivation and behaviour erodes autonomy and, if so, whether this makes it wrong. (shrink)

Prescient essays about the state of our politics from the philosopher who predicted that a populist demagogue would become president of the United States Richard Rorty, one of the most influential intellectuals of recent decades, is perhaps best known today as the philosopher who, almost two decades before the 2016 U.S. presidential election, warned of the rise of a Trumpian strongman in America. What Can We Hope For? gathers nineteen of Rorty’s essays on American and global politics, including four previously (...) unpublished and many lesser-known and hard-to-find pieces. In these provocative and compelling essays, Rorty confronts the critical challenges democracies face at home and abroad, including populism, growing economic inequality, and overpopulation and environmental devastation. In response, he offers optimistic and realistic ideas about how to address these crises. He outlines strategies for fostering social hope and building an inclusive global community of trust, and urges us to put our faith in trade unions, universities, bottom-up social campaigns, and bold political visions that thwart ideological pieties. Driven by Rorty’s sense of emergency about our collective future, What Can We Hope For? is filled with striking diagnoses of today’s political crises and creative proposals for solving them. (shrink)