has been defined as a philosophical movement or tendency, emphasizing individual existence, freedom and choice that influences many diverse writers in the 19th and 20th centuries. The philosophical term came from Jean Paul Sartre, a French philosopher. He combined the theories of a select few German philosophers, the phenomenology of Edmund Husserl, the metaphysics of G.W.F. Hegel and Martin Heidegger, and the social theory of Karl Marx. This philosophy became a worldwide movement. One phenomenon of this theory is its proliferation. Since it ....