Why is public debate increasingly polarised - and what can we do about it?In this original, eloquent essay, Waleed Aly and Scott Stephens explore the ethics and politics of public debate - and the threats it now faces.In a healthy democracy we need the capacity to disagree. Yet Aly and Stephens note a growing tendency to dismiss and exile opponents, to treat them with contempt. This toxic partisanship has been imported from the United States, where it has been corrosive - and a temptation for both left and right. Aly and Stephens analyse some telling examples and look back to heroes of democracy who found a better way forward.This compelling essay draws on philosophy, literature and history to make an urgent case about the present.