Many earth religions included pantheistic values in their relationship with Gaia. The Goddess cults also leaned toward pantheism.
Pantheism still pervades many pagan religions.
In the sixties, Robert Heinlein published a chopped version of his science fiction novel, Stranger in a Strange Land, and pantheism was reborn concurrently with the escalation of the hippie movement. The seventies brought a new kind of pantheism called Scientific Pantheism. I won't try to explain their credo or doctrines, but urge the curious to keep in mind that there are all types of Pantheism being presented on the Internet. They believe that the universe is divine but that there is no such thing as a god. Most of the Pantheist groups are inclusive and allow discussion and debate of controversial issues.