Marijuana possession by adults became legal in Colorado after a vote in 2012.
Marijuana possession by adults became legal in Colorado after a vote in 2012. Brennan Linsley The Associated Press
Marijuana possession by adults became legal in Colorado after a vote in 2012. Brennan Linsley The Associated Press

Danielle Allen: We already know how to win the war on drugs

December 31, 2015 9:00 AM