Sheldrake's extended thought concept is based on Vernadsky's proposition of the "three spheres of existence": the geosphere (of inanimate material), the biosphere (animate), and the noösphere (the extended mind).
Of course, Graham Hancock's proposition that human creativity was sparked amongst prehistoric peoples by "visionary plants", was echoed by Huxley, who along with Leary were convinced LSD would spark the next great leap in evolution, if only they could get all of humanity on acid at once.
Both the noösphere and the hallucinogen as an agent of evolution are controversial topics at the very least, but it is the responsibility of science to investigate these matters.
My science teacher in middle school held up an old science text book and said, "Science never stays constant. It always changes and it is the duty of the scientist to accept the fact his work may be proven wrong at any time in the future."
I was eleven when he said that, and I still remember it.
"Cowards & idiots can come along for the ride but they gotta sit in the back seat!"
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