Check out the movie The End of Poverty? On Netflix. It really shows how colonialism and capitalism work together and how the rich country's are rich and how they became rich, on the backs of slave or cheap labor.
"...the illegality of cannabis is outrageous, an impediment to full utilization of a drug which helps produce the serenity and insight, sensitivity and fellowship so desperately needed in this increasingly mad and dangerous world."
- Carl Sagan
