The reason that MJ is illegal is because of hemp, look up hemp and all of its good uses and why it became illegal. MJ just got roped into all of it and then the whole illegal drug thing spiraled out of control. There are full books on how it all happened, court cases, timelines, everything, and all who smoke can blame it on hemp! Even the presidents way back when like Washington, Jefferson, and Franklin used to grow hemp because it was a very useful crop. In 1937 popular science called hemp the "billion dollar crop" because it made better paper than wood pulp, better clothing than cotton, extremely strong rope that competed with nylon rope, and hemp seed biodeisel fule was extremely cheap (this is all not including how nutritious hemp seed is also). Anyway to make a long story short, hemp would have cut into a lot of wealthy and powerful peoples pockets so they roped it in with MJ saying it was bad for people (the whole drug thing) and poof, away hemp and MJ go.