A Case for Psychedelic Scepticism

One of the reasons I wanted to write a book on the philosophy and psychology of psychedelic experiences was to defend a sceptical attitude towards these experiences. (You can find preorder links and more information about my book here.) The book’s title, Altered Perspectives, is partly related to this motive. Just as psychedelics can alter our…

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Diet and the Evolution of the Human Brain

The evolution of the human brain has always been shrouded in mystery. This is because the organ tripled in size over the course of nearly seven million years, a pace of evolution that is unheard of in the natural world. Most of this growth occurred in the past two million years, during which time the…

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A Critique of Terence McKenna’s ‘Stoned Ape Theory’

In his book Food of the Gods (1992), Terence McKenna describes one of his many controversial ideas. This idea, known as the ‘Stoned Ape Theory’, relates to how our ancestors evolved to produce language and create art. In a nutshell, the Stoned Ape Theory says that magic mushrooms sped up the evolutionary process and that, ultimately,…

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