The only difference between most illegal drugs and legal drugs like drinking alcohol/smoking tobacco is that white middle-class families in the US rebelled when one was banned, but due to propaganda celebrated when the other was banned.
Most narcotics were banned in the 20th Century because the US government found it a useful propaganda technique to maintain power. It has historically been a club which the Government would use to stigmatize factions/minorities (Mexicans/weed, hippies/psychedelics, blacks/crack)
This article is a great read on the topic and exposes the lies that have been told over the century. If you don't think it's a method of maintaining power then you have to ask yourself why Governments repeatedly ban legal, safe, alternative highs.
theguardian.com/commentisfree/…
theguardian.com/commentisfree/…
