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).
Due to the illegal and hostile nature of
London's black market, many o' dealers import intoxicating substances as well as producing their own native
drugs. This combined with it's high population makes the citizens of
London a good example of psychedelic selection. (especially when involving predators such as the wild pig).