In the 2016 referendum on whether Britain should leave the European Union, a stark division emerged: those with university degrees were far more likely to vote remain than those with few educational qualifications. And Britain is not the only country where such a gap exists - in the recent American presidential election, far more graduates voted for Hillary Clinton than for Donald Trump. Edward Stourton investigates the impact of this faultline on voting and politics, and asks how policy makers and wider society should respond.

Producer: Neil Koenig.