The book offers brief examination and analysis of fundamental moral terms constituting ethical theories while proposing clarifications of them. It consequently considers whether the three major ethical theories - Teleology, Deontology, and Utilitarianism - adequately explain human conduct and humans' propensity to seek happiness given these theories' notions of the latter. After brief exposition of recognized and less known problems with each of the theories' projects, the book offers new and improved definition of happiness which accommodates these theories' important claims (...) and notions of happiness while addressing some of the objections to defining happiness as living a good life or contemplation, duty, and experiencing pleasure. The book concludes with a defense of morality as a necessary component of human life and the idea that we must engage in the pursuit of happiness ethically. (shrink)