The United Nations General Assembly will hold a special session April 19 to April 21 to discuss changing its policies initiated in the 1960s criminalizing drugs and drug users. It is now widely recognized that those policies have failed. Hopefully, topping the list of reforms by the U.N. body will be the removal of marijuana from the Single Convention on Narcotic Drugs, an international treaty to prohibit the production and supply of specific drugs.

Hundreds of advocates for marijuana legalization rally and smoke pot outside the White House in Washington, D.C.

That could go a long way toward clearing away international agreements that have been among the impediments to decriminalization of marijuana by the U.S. government. It would also put an end to the billions of dollars wasted each year on the U.S. government's continuing war on marijuana, which has continued even as a growing number of states are legalizing marijuana.