I'm proposing on one level that hallucinogens be thought of as almost as social pheromones that regulate the rate at which language develops, and therefore regulate human culture generally.
...how much needless despair has been caused by a series of biological mismatches, a misalignment of the hormones and pheromones? Resulting in the fact that the one you love so passionately won't or can't love you. As a species we're pathetic that way: imperfectly monogamous.
The ant world is a tumult, a noisy world of pheromones being passed back and forth.
Pheromones are Earth's primordial idiom.