I've read that a big factor in the illegalization of weed goes back to Dupont putting out and fronting propaganda in early 1900's against it because compared to it's nylon and cotton products, hemp products were more economical with higher profits. I've seen some of the old 'awareness ads', and they're pretty ridiculous! It was linked to uncontrollable sexual behavior of blacks (raping white women), and other nonsense and lies.