One reason that crime is down is that the STATE is now not inventing criminality via legislation. Marijuana should have ALWAYS been legal. It should never have been made illegal by this corrupted State called America with it’s contrived War on Drugs.
We can all thank Nixon for the trumping up of the War on Crime which morphed into the War on Drugs which has always, in reality, been a war on American citizens (specifically the poor and minorities).
If one reads the history of the War on Crime/Drugs, it becomes apparent that this scheme has always been, first and foremost, a scam to scare Americans into voting for particular candidates as well as a means of slowly and methodically gaining acquiescence from the pubic for destruction of the United States Constitution.
Nixon all but clearly states this as his goal in the beginning of the mad and criminal venture.