Marijuana was criminalized in 1923, but why?

[rwana]

http://i.cbc.ca/1.2038670.1381645342!/httpImage/image.jpg_gen/derivatives/16x9_460/hi-pot-protest-8520745.jpg Canada criminalized marijuana in 1923, one of the first countries to do so. There was no parliamentary or public debate and the government gave no explanation. And there were few pot smokers.


more .... (http://www.cbc.ca/news/health/marijuana-was-criminalized-in-1923-but-why-1.2630436?cmp=rss)