In his new book, best-selling author Michael Pollan explores what our endless craving for drugs like opium, caffeine and mescaline says about us.
South Africa is experiencing some of the worst violence its seen since the end of apartheid in the 1990s. It all started as a protest against the jailing of a former president, but the issue has exposed deeper issues of poverty and inequality.
Live guests: Michael Pollan, bestselling author and journalist Sally Sara, ABC presenter and former Africa correspondent
