One can hardly doubt that consciousness, like the ability to resist disease, confers an immense adaptive advantage on any individual who possesses it. In the search for a causal agent capable of synergizing cognitive activity and thereby of playing a role in the emergence of the hominid, researchers might long ago have looked to plant hallucinogens were it not for our strong, almost compulsive avoidance of the idea that our exalted position in the hierarchy of nature might be somehow due to the power of plants or natural forces of any sort. Even as the nineteenth century had to come to terms with the notion of human descent from apes, we must now come to terms with the fact that those apes were stoned apes. Being stoned seems to have been our unique characteristic.

• consciousness
• evolution
• adaptation
• existence
• psychedelic drugs
• drugs
• nature
• science
• fear
• religion
• humanity
• population growth
• power
• doubt
• activity
• disease
• plants