Evolution
If we look at the ancestors of man's ancestors, we come across mushrooms in the family tree. Humans are more closely related to the fungi than the plant kingdom.
Man has become smart thanks to magic mushrooms
People have become what they are today thanks to hallucinogenic mushrooms. Mushrooms have the property that people produce more BDNF allowing the brain to develop better. Although this is still only a hypothesis, we believe it is plausible because magic mushrooms are also mind-expanding today.
Video explanation
It may all sound a bit far-fetched, but a good explanation explains a lot. Check this one out Youtube video and share your opinion.