[scns]

How did drugs become illegal? Check out the documentary series Hooked. Short answer: Racism and corruption.

[addendum]

Marijuana and Methamphetamine:

https://www.youtube.com/watch?v=ZvGtn8RzF0U&list=PL2-GCln73g...

Ecstasy, LSD & the Raves:

https://www.youtube.com/watch?v=3id6j6nJmlo&list=PL2-GCln73g...

Opium, Morphine and Heroin:

https://www.dailymotion.com/video/x2ocqwm

[mensetmanusman]

This is true in China as well?