Greek philosophers sought to know the nature of the cosmos and the human soul. Utilitarianism proposes that we act in a way that produces the greatest good for the greatest number of people. Marxism explains human history in terms of the material conditions of existence. History, according to Marxism, has been an arena of conflict between property owners and workers. He believed in the possibility of a superior kind of human being.
Existentialism espouses commitment and authenticity.
Postmodernism criticizes the traditional aspirations of reason. Feminist philosophy uncovers the male perspective implicit in much of traditional philosophical thought and explores women's ways of knowing and valuing. Act by letting nature act through you. We are already enlightened and need only to realize this by seeing directly into our Buddha-nature.