I. Common Traits of the Classical Systems of Ethics: An Introductory Letter About what will not be Said -- II. Five Epistemological Notes About Good and Evil -- 1. The Development of a Personโs Sense of Morality -- 2. The Ideals -- 3. The Logical Role of the Ideals -- 4. The Essence of the Good. The Meaningless -- 5. The Development of the Epistemology of Morality -- III. The Ethics of Decisions: A Dialog on Demystified Ethics -- 1. Whether investigations according to the principles suggested in the preceding notes belong to ethics at all -- 2. Whether there do not exist still other ethical questions -- 3. Whether ethics is analogous to geometry -- 4. Whether systems of norms might not be combined by logical operations -- 5. Whether decisions are the only basis for morality -- 6. Whether rational foundations for decisions are possible -- 7. What role faith plays in morality -- 8. What demystified ethics might be able to achieveโฆ -- 9. โฆ except for a logic of norms -- 10. โฆ and except for a logic of desires -- IV. Five Logico-mathematical Notes on Voluntary Associations -- 1. The Partitions of People Induced by Norms -- 2. Duality -- 3. Disjunctive Norms -- 4. A Personโs Demands on Himself and on Others -- 5. Several Modes of Behavior -- V. Logic, Imagination, Reality, Evaluations: A Concluding Letter about what has been said -- Postscript to the English Edition -- Karl Menger: Principal Dates -- Fields of Research -- Publications in Book Form

1. Philosophy
2. Philosophy and science
3. Philosophy and social sciences
4. Philosophy
5. Philosophy of the Social Sciences
6. Philosophy of Science