For more than four centuries Britons have been dominating and colonising other peoples and territories. Britain's Empires tells that story without flinching from the oppressive and exploitative side of the imperial mission that shaped world history. It also aims to tell the story of the colonial past as one marked by change and reinvention, where each new era was embarked upon as a break with the past. This is history of the many different British Empires - the Old Colonial System (1600-1776), the Empire of Free Trade (1776-1870), the New Imperialism (1870-1945), Decolonisation (1945-1990) and the era of humanitarian intervention (1990-2020). Britain's Empires explains how imperial policy dominated and skewed the history of societies across the world, from Canada and the West Indies to Ireland, from Africa to the Middle East, from India to China and into Australasia; but also how the peoples of those territories imposed themselves on Britain, challenging slavery, standing up to colonial overlords and eventually overthrowing them. The history of Britain's Empires, explains Heartfield, is one of constant challenge and change, where vanquished become victors, and heroes often turn out to be villains.