ETHICS

is closely connected, as a science, with theology, psychology, politics, political economy, and jurisprudence, but what most strictly belongs to it is the investigation of the principles and basis of duty, or the moral law ana also an inquiry into the nature and origin of the; faculty by which duty is recognized. The foundations of the leading systems were chiefly laid by So crates, Plato, Aristotle, Epicurus, the Cynics and the Stoics.