We live in an age of extremes: populist leaders are setting the agenda, autocracies are on the march, and the liberal establishment is a bewildered blob, devoid of new ideas or fresh solutions. Having once powered progress in the form of democracy, mass welfare and defeating totalitarianism, liberals have the power to save the world again – but only if they rediscover the lost genius of their creed. Guiding us skilfully and entertainingly through the intellectual, cultural and political histories of liberalism, this book lays out a centrist agenda for today’s problems. It reminds us of the dynamism and fixed principles that have shaped the successes of liberalism and warns us against splitting into sub-groups that fail to grapple with the common good. Wooldridge proposes that, as well as reviving social mobility, liberals today need to be much more critical of big business – particularly if it makes money by manipulating choices and spreading misinformation – and rethink the laissez-faire approach to immigration, social disorder, and substance abuse. A powerful call to action, Centrists of the World Unite! shows us how liberals of all parties and none can come together in defending the values of liberal civilization from enemies without and within.