I am under the impression the United States pushed hard for the international treaty in 1961 that required these drugs be prohibited in most of those countries.

I am under the impression the United States pushed hard for the international treaty in 1961 that required these drugs be prohibited in most of those countries. https://en.m.wikipedia.org/wiki/Single_Convention_on_Narcotic_Drugs https://en.m.wikipedia.org/wiki/Single_Convention_on_Narcoti...