The historiography of the British Empire refers to the studies, sources, critical methods and interpretations used by scholars. Historians and their ideas are the focus here; specific lands and historical dates and episodes are covered in the article on the British Empire. Scholars have long studied the Empire, looking at the causes for its formation, its relations to the French and other empires, and the kinds of people who became imperialists or anti-imperialists, together with their mindsets. The history of the breakdown of the Empire has attracted scholars of the histories of the United States (which broke away in 1776), India (independent in 1947), and the African colonies (independent in the 1960s). John Darwin (2013) identifies four imperial goals: colonizing, civilizing, converting, and commerce.
Historians have approached imperial history from numerous angles and turns over the last century. In recent decades scholars have expanded the range of topics into new areas in social and cultural history, paying special attention to the impact on the natives and their agency in response. The cultural turn in historiography has recently emphasised issues of language, religion, gender, and identity. Recent debates have considered the relationship between the "metropole" (Britain itself, especially London), and the colonial peripheries. The "British world" historians stress the material, emotional, and financial links among the colonizers across the imperial diaspora. The "new imperial historians," by contrast, are more concerned with the Empire's impact on the metropole, including everyday experiences and images. Phillip Buckner says that by the 1990s few historians portrayed the empire as benevolent. The new thinking was that the impact was not so great, for historians had discovered the many ways which the locals responded to and adapted to Imperial rule. The implication Buckner says is that Imperial history is "therefore less important than was formerly believed."
Historians agree that the Empire was not planned by anyone. The concept of the British Empire is a construct and was never a legal entity, unlike the Roman or other European empires. There was no imperial constitution, no office of emperor, no uniformity of laws. So when it began, when it ended, and what stages it went through is a matter of opinion, not official orders or laws. The dividing line was Britain's shift in the 1763-93 period from emphasis on Western to Eastern territories following U.S. independence. The London bureaucracy governing the colonies also changed, policies to white settler colonies changed and slavery was phased out. The first major history was The Expansion of England (1883), by Sir John Seeley. It was a bestseller for decades, and was widely admired by the imperialistic faction in British politics, and opposed by the anti-imperialists of the Liberal Party. The book points out how and why Britain gained the colonies, the character of the Empire, and the light in which it should be regarded. It was well written and persuasive. Seeley argued that British rule is in India's best interest. He also warned that India had to be protected and vastly increased the responsibilities and dangers to Britain. The book contains the much-quoted statement that "we seem, as it were, to have conquered half the world in a fit of absence of mind". Expansion of England appeared at an opportune time, and did much to make the British regard the colonies as an expansion of the British state as well as of British nationality, and to confirm to them the value of Britain's empire in the East. In his history of the British Empire, written in 1940, A. P. Newton lamented that Seeley "dealt in the main with the great wars of the eighteenth century and this gave the false impression that the British Empire has been founded largely by war and conquest, an idea that was unfortunately planted firmly in the public mind, not only in Great Britain, but also in foreign countries".