It is about locking up poor people in order to keep them from voting.
It is about filling our prisons with non-violent offenders so we can force them to work for slave wages, and line the owners of the prisons and the politicians they fund's pockets.
It's about political suppression, not about some moralistic crusade to protect people from drugs.
"The Nixon campaign in 1968, and the Nixon White House after that, had two enemies: the antiwar left and black people. You understand what I’m saying? We knew we couldn’t make it illegal to be either against the war or black, but by getting the public to associate the hippies with marijuana and blacks with heroin, and then criminalizing both heavily, we could disrupt those communities. We could arrest their leaders, raid their homes, break up their meetings, and vilify them night after night on the evening news. Did we know we were lying about the drugs? Of course we did." - John Ehrlichman