Sigmund Freud framed the questions of the psychological debate, and on that basis, his place in history is well deserved. His answers to those questions, though, have been pretty thoroughly discredited. In spite of this, Freud's take on things psychological has invaded popular culture, and will continue to rattle around in the general consciousness for decades to come.
Joseph Campbell used Freud's work extensively in building his Monomyth concept, which has also invaded popular culture, and will will continue to rattle around in the general consciousness for decades to come. This in spite of the fact that Campbell's work has been largely discredited among his academic peers.
Christopher Vogler used Campbell's work as the basis of,"The Writer's Journey", an enormously influential manual on writing screenplays. Vogler's work, based on Campbell's discredited work, based on Freud's discredited work, is having a significant impact on the entire film industry, and the films influenced by Vogler's work will continue to have an impact on the general consciousness for a VERY long time.
I am not sure if I should be amused or horrified by all of this. Probably both.