Ethical naturalism
Ethical naturalism (also called moral naturalism or naturalistic definism) is a position in metaethics that holds that moral properties or facts are reducible to, or constituted by, natural properties (as understood within philosophical naturalism) and can in principle be investigated using empirical or scientific methods. It is generally regarded as a form of moral realism, since it maintains that moral statements can be true or false depending on features of the natural world.