I'm guessing the first cannabis was in the garden of eden and Adam and Eve used the leaves for clothing instead of fig leaves.
Later, the neanderthals were using it to start their fires and after inhaling for a while, that's where the phrase, "Gotta find a woman" originated.
And it definitely had a place in Noah's Ark's garden to help settle down some unruly animals.
So cannabis has been around a long long time. Adam's original name for it was "Wacky".