How have post modernist ideas manifested in themselves in public policy and culture?
The question is like asking how did medieval ideas affect medieval society?
Rather, postmodernist ideas are reflections of the postmodern culture.
Take for instance Francois Lyotard’s Postmodern Condition. It was a description of what the postmodern era is. It was not a manifesto about why the culture should be postmodern – and it wasn’t an argument for “postmodernism,” as if to say we should all be postmodernists. Too late, the world is already this way. Postmodernism and the postmodernist theorists are not ‘advocating’ postmodernism as a theory for living or a set of ideas that one could derive a philosophic “system” from. They are more like prophets and seers describing a car crash as it is happening.
The theorists do not praise postmodernism. They denounce it. Postmodernism is the era of the virtual commodity, the culture of nihilism, artificial war, asymmetrical war, the sign economy, cynical data, apathy, the society of mass spectacles. Our metaphysics are completely virtual. We are profoundly bored, alienated. We are on a path toward annihilation. Human experience is reduced to commodification.
So, if the theorists have affected society with their ideas, it has only been to confuse people with the terms they use. (It seems mostly the Christians are chattering about the term “postmodernism” these days.) The left’s connection to postmodernity is fractured (as it would be) and divided over its neurotic tendencies to split off into tiny camps. The person on the street says postmodernism is irrelevant to their lives. When the reality of “postmodernism” is the mode of production, the mode of being, the entire “enframing” of our society. Just like medieval ideas were for medieval society. People are affected by postmodern ideas through any art, commodity, (art is commodity) or anything which was inspired by the culture of nihilism itself.