For years I’ve argued in lectures and writings that psychedelics, probably mushrooms, accidentally or deliberately ingested by early primates, triggered synesthetic experiences that formed the critical foundations of human language and cognition, the association of inherently meaningless sounds or images with inherently meaningful symbols and ideas. Spoken or written language is a synesthetic activity that takes place effortlessly and automatically in the process of understanding a language. In speaking, the vocal apparatus produces “small mouth noises,” small puffs or explosions of air that are inherently meaningless. But because we have learned the language, we all participate in the consensus that certain meaningless noises are associated with inner, visualized images or symbols that, as cognitive constructs, are imbued with meaning. These images and symbols, seen by the mind’s eye and associated with symbolic import, supply the “meaning” to various vocal expressions. In reading, the process is similar, except that a written symbol or word evokes an inner perception of the sound that is associated with the written word or symbol, and this, in turn, evokes an inner visualization of the meaningful symbol or word associated with that sound. Is this not also synesthesia?
What I’m suggesting, in effect, is that early on in the evolution of the human neural apparatus, the ingestion of psychedelics triggered the invention of language. I am not arguing here that psychedelics somehow affected our genes, at least not directly; rather, that they are teaching tools. Creating and using language is an acquired skill, dependent on an ability to discern meaning—significance—in images, sounds, and symbols. Psychedelics taught us how to do that; and, they are still teaching us! Once a small group or primates had acquired that skill, it could be easily taught to others, especially with the aid of the psychedelic teaching tools.