Moral philosophy has to with the ideas of good, bad, right, wrong, ought, duty, obligation. This chapter discusses nature of these ideas, their relation to one another, and the ways in which people become aware of them. The opening up of wide ranges of knowledge is truly liberalizing, it gives new perspectives, so that in enlarging our outlook it often changes it radically. Objective, factual study of the widest kind, of human nature and its needs is, an indispensable basis for the reasonable knowledge of the content of the good life. Both Plato and Aristotle in their own ways based their study of what is good and right upon a view of human nature. Supreme Good has a high falutin sound and must be brought down to earth. The supreme good for human beings has to be imagined in a very concrete way. It must be agreed that social cohesion, social mechanics, is a regulative mechanism for social morality.