With the advent of transatlantic flights, cheap long distance and the Internet, idea exchange grew and melded. As different cultures were exposed, the idea of many peoples-one planet came to light. In the scientific realm, there was a shift from the Enlightenment vision of science as an objective abstraction to a more postmodern view of science as a subjective creation of the human mind. In English, this means that Postmodernism thought is participatory rather than detached. Logic does not rule the postmodern world.
Control gives way to chaos.
Where there once was consistency of style and idea, postmodernism embraces the eclectic. It validates the non-intentional. Postmodernists put more faith in humor and irony and less faith in theorizing. Art and architecture especially was affected by postmodern philosophy. For a deeper look, click the link above.