Postmodernism is a philosophical movement born after World War II, brought about by a disillusionment with the objectivist stance on reality boosted by The Enlightenment. To be honest, a renaissance of human knowledge never truly took off during the time we know of as "The Renaissance" -humanity had to wait until the 19th Century for the Enlightenment ideals to actually take hold of society and governments. This truly was the age of Rationalism and Science.
