The story of this book begins in the seventeenth century, when a small sea-faring island, one tenth the size of the Indian subcontinent, despatched sailing ships over 11,000 miles on a five-month trading journey in search of new opportunities. In the end they helped build a new nation. The sheer audacity and scale of such an endeavour, the courage and enterprise, have no parallel in world history. This book is the first to assess in a single volume almost all aspects of Britain's remarkable contribution in providing India with its lasting institutional and physical infrastructure, which continues to underpin the world's largest democracy in the twenty-first century.