A report says cheaper , purer illegal substances suggest war on drugs is failing . Kevin Sabet : Actually , global drug use has been stable over the past decade . With help from the United States , Colombia has managed to reduce the amount of land dedicated to coca growing by nearly two-thirds from 2000 to 2010 . The UN estimates that in 2010 there were about 100 million illicit users worldwide. Sabet : Legalization means companies will try to increase addiction to make more money .
A report says cheaper , purer illegal substances suggest war on drugs is failing . Kevin Sabet : Actually , global drug use has been stable over the past decade . The UN estimates that in 2010 there were about 100 million illicit users worldwide. Sabet : Legalization means companies will try to increase addiction to make more money .