Is a classless society impossible? Plus, fresh dirt on the Cambridge Five spies

German philosopher Hanno Sauer argues that class hierarchies are a permanent feature of human societies. So if true equality is elusive, how do we live with class? Plus new revelations on the Cambridge Five - the young men who spied against Britain from the 1930s to the 1950s. Guests: Hanno Sauer, Associate Professor of Philosophy at the Department of Philosophy & Religious Studies at Utrecht…