Catherine Carr asks why excessive drinking can sometimes seem to be socially acceptable. And why countries like America and India have at times turned against alcohol. She hears stories of addiction in India and Kenya and a history of temperance and prohibition movements in America. Medical specialists explain why people can become alcoholics, why some people are drinking more and the treatments available. How Alcoholics Anonymous began and how a new synthetic alcohol may provide a solution.

(Image: People drinking, Credit: Shutterstock)