Mushrooms

These symptoms suggested that our evolution, I suppose from the Animal kingdom into the Human kingdom was catalyzed, or triggered by our encounter with these hallucinogenics.

We are an ape with a symbiotic relationship to a mushroom, and that has given us self reflection, language, religion, and all the spectrum of effects that flow from these things.

And one can only wonder how these hallucinogens might effect our future evolution as well.

Actually mushrooms do form symbiotic relationships, but only with plants. These are called mycorrhizae, and they are very important to the survival of plants and animals. This is why I hate vegetarians who refuse to eat animals but gladly eat mycoproteins as a "meat substitute." Rather than killing off one kingdom, you are effectively killing off three, including the one you're trying to "save". There's a good reason mycologists are asked to leave some or certain parts of the fungi they come across, but brands like Quorn just uproot mushrooms en masse.