Psychedelic selection

[Rihanna]

The process whereby organisms better adapted to their environment tend to survive and consume more drugs. The theory of its actions are dependant on legality, location, physical health, lung capacity, experience and local hemp-life. It is now regarded as the main process that brings about the evolution of [the sesh] and the drugs/subspecies/strains involved.
(Firstly used to describe the psychedelic [ecosystem], this definition has since changed to include Cannabis and all other drugs [by proxy]).