The document discusses key concepts in moral philosophy including morality, ethics, and philosophy. It defines morality as principles of proper conduct and ethics as the study of moral concepts like good and evil. There are two types of morality - descriptive referring to cultural norms, and normative referring to universal rational standards. Four basic moral principles are identified - do good, treat others well, ends don't justify means, and follow human nature. Ethics examines domains like meta-ethics concerning meaning, normative ethics concerning action, and applied ethics concerning specific issues. Moral philosophy studies the origin and knowledge of morals through examining systems like deontology based on rules and consequentialism based on outcomes. Its three branches are normative ethics on how we