Define doublethink. How does it work?

Doublethink - Reality Control. The power to hold two completely contradictory beliefs in one's mind simultaneously and accept both of them. An excellent example of doublethink in modern society is the war on drugs. If you ask people their opinion on alcohol prohibition in the 1920s, most people would agree that it was a complete failure. People agree that it only caused more crime, it made gangsters rich, it corrupted politicians, and most importantly ... it didn't keep people from drinking.