'modernism' is/was a (poorly named) philo-artistic 'movement'.
postmodernism just refers to a movement that came into existence (or at least into fashion) after modernism. it's at least as old as the 50s or 60s.
postmodernism just refers to a movement that came into existence (or at least into fashion) after modernism. it's at least as old as the 50s or 60s.