> Marijuana often seems to promote thinking "outside the box"
Hard disagree. Cannabis induces a sensation of profundity. It makes ordinary mundane thoughts feel insightful and novel. The ideas you have when on cannabis seem like insightful out of the box ideas, but that's a perceptual illusion created by the drug. The best it can do is provide you the encouragement to see ideas through to the end, but of course this is tempered by the way it generally has a negative effect on motivation, so most often users are left thinking of ideas they think are wonderful, but not actually executing on those ideas. End result is usually a couch potato lost in unproductive thoughts.
I think he was inspired by Valium and other benzos. They put people into a docile, low-anxiety state, and they were popular around the time the book was written.
That's also more-or-less consistent with the implied literary reference to the Lotus Eaters, who I think are usually imagined as opium users. Opioids are different but are also downers that reduce anxiety.
Benzos later featured significantly in one of Adam Curtis' film-essays -- maybe Century of the Self, maybe another one. I'd view those films as being in a similar spirit to Brave New World.
If we are talking about BNW, which was written in 1931, then that book predates benzodiazepines by 25 years or so. Perhaps you are thinking about barbiturates?
Oof! Thank you for the correction. I should have checked the publication date. I thought it was from the late '50s; I was wrong.
(By contrast, turns out 1984 -- which is always paired with BNW -- came out later than I thought, in '49. Yet BNW seemed more forward-looking. I always imagined it was written partially in response. It wasn't.)
There goes my benzo theory.
Though they remain what I imagine when I read about soma.
Marijuana often seems to promote thinking "outside the box" which is probably not what the Brave New World people would want for their population