Philosophy_5_Branches. Philosophy. The rational, systematic investigation of life. '. s big questions and concepts. Metaphysics. Investigates the nature of existence. Epistemology. Investigates the nature of knowledge. Logic. Investigates correct reasoning. Moral Philosophy / Ethics. Investigates moral judgments. Aesthetics. Investigates art, and value judgments about art. Normative Ethics. Applied Ethics. Meta-ethics. Created by Karla Pierce. www.purplebike.com (2008). The Legacy of Socrates. The Case Against Free Will. The Debate Over Free Will. Ethics and Objectivity. Why Should We Be Moral?. The Meaning of Life. How to Evaluate Arguments. God and the Origin of the Universe. The Problem of Evil. Do We Survive Death. The Problem of Personal Identity. Body and Mind. Could a Machine Think?. The Case Against Free Will. The Debate Over Free Will. Our Knowledge of the World Around Us. Though these main branch distinctions are somewhat artificial, and many of these topics belong in more than one branch; these distinctions provide a useful roadmap for newcomers to the field of philosophy.. Where Each Chapter From Our Text Belongs Among The Five Main Branches of Philosophy . These chapters are from James Rachels. '. 2008 text, . Problems From Philosophy.