For better or for worse, the British empire was the most important thing the British ever did. It altered the course of history across the globe and shaped the modern world. It also led to the huge enrichment of Britain, just as, conversely, it led to the impoverishment of much of the rest of the non-European world. India and China, which until then had dominated global manufacturing, were two of the biggest losers in this story, along with hundreds of thousands of enslaved sub-Saharan Africans sent off on the middle passage to work in the plantations.