Bioethics, branch of applied ethics that studies the philosophical, social, and legal issues arising in medicine and the life sciences. It is chiefly concerned with human life and well-being, thought it sometimes also treats ethical questions relating to the nonhuman biological environment.
Normative ethics, the part of moral philosophy, or ethics concerned with criteria of what is morally right and wrong. It includes the formulation of moral rules that have direct implications for what human actions, institutions and ways of life should be like.
In evolutionary ethics, as in evolutionary epistemology, there are two major undertakings. The first concerns normative ethics, which investigates what actions are morally right or morally wrong; the second concerns metaethics, or theoretical ethics, which considered the nature, scope, and origins of moral concepts and theories.
Ethical naturalism is the view that moral terms, concepts, or properties are ultimately definable in terms of facts about the natural world, including facts about human beings, human nature, and human societies.