Abstract

RATIONAL ALTRUISM. A PRUDENTIAL THEORY OF RATIONALITY AND ALTRUISM - STRUCTURE: "Rational altruism" is the attempt to develop and rationally justify moral principles - with a very strong emphasis on this justification. The concept of justification is developed in a metaethical part (ch. 2); it requires recourse to prudential decisions and to information about our decision-making procedures. The actual normative ethics (Ch. 6 and especially 7) is therefore still based on a prudential desirability theory (Ch. 4 and Sections 5.5-5.6) and this in turn on an empirical action theory (Ch. 3 and Sections 5.1-5.4). - METAETHICS (Ch. 2): In the metaethical part of the book, conditions of adequacy for cogent moral justifications are first developed and justified, which demand, among other things, an information-stable motivation through cogent moral justifications (internalist moral justification). After an examination of various approaches to justification in ethics with regard to this adequacy condition and the negative outcome of this examination, an alternative solution strategy is presented. Among other things, the rationality requirements of profane rational reasoning approaches in ethics are to be systematically reinforced by a prudential desirability theory that aims at information-stable evaluations. - EMPIRICAL THEORY OF ACTION (Chapter 3 and Sections 5.1-5.4): The empirical theory of action developed here therefore provides a detailed analysis of the regularities and leeway of our decisions, especially the influence of information on decision-making paths. - PRUDENTIAL DESIRABILITY THEORY (Chapter 4 and Sections 5.5-5.6): In the prudential desirability theory, the 'individual desirability' of events, especially actions, is then defined in such a way that, of the various evaluation possibilities, the one that is stable in terms of information is always chosen. This procedure far exceeds the rationality requirements of rational decision theory, for example. - NORMATIVE ETHICS (chap. 6 and especially 7): Finally, in the actual normative ethics, a prioritarian standard for the moral evaluation of actions, norms and entire social orders is developed, called "Utilex". Utilex is based on compassion and, like compassion, is partial to the worse off, the poor and unfortunate, but without neglecting the interests of the better off.