Never in human history was there such an opportunity for freedom of expression. If we have internet access, any one of us can publish almost anything we like and potentially reach an audience of millions. And never was there a time when the evils of unlimited speech flowed so easily across frontiers: violent intimidation, gross violations of privacy, tidal waves of abuse. With vivid examples – from his personal experience of China’s Orwellian censorship apparatus to the controversy around Charlie Hebdo as well as a very English court case involving food writer Nigella Lawson – Garton Ash proposes a framework for civilized conflict in a world in which we are all becoming neighbours.