In postmodern thought nihilism is never fully eradicated. It lurks, ready to pounce, at any opportunity. Behind postmodernism is nihilism, claws at the ready.
Nihilism is the negation of meaning, purpose and value. If there is no way to know whether God exists apart from a leap of faith, then there is no reason to leap at all. If nature is arbitrary in its treatment of its inhabitants, then life is arbitrary. In its existential guise, nihilism denies any basic assumption about the nature of humanity and posits, in its place, pure existence. Humanity is reduced to beast, but is unable to live completely as one. Life is fundamentally meaningless, but persistent. The nihilist has no answer to this problem and thus lives an inconsistent life. Postmodernism is the attempt to live out this inconsistency.