What is harder to comprehend is why virtually all people, and more than a few animals, should have acquired such a desire in the first place. What good, from an evolutionary standpoint, could it do a creature to consume psychoactive plants? Possibly none at all: it’s a fallacy to assume that whatever is is that way for a good Darwinian reason. Just because a desire or practice is widespread or universal doesn’t necessarily mean it confers an evolutionary edge.
