Imperialism is the extension of a state’s power over other territories and peoples, whether through direct political control, economic dominance, or cultural influence. In the context of A-level history, it most often refers to the European empires of the nineteenth and twentieth centuries and to the debates about how and why those empires were built, maintained, and dismantled.
Formal and informal imperialism
Formal imperialism involves direct political control — colonial administrations, governors, occupation. The British Raj in India, the French in Algeria, the Belgians in the Congo were formal imperial arrangements.
Informal imperialism involves economic and political influence without direct rule. Gallagher and Robinson’s influential concept of ‘the imperialism of free trade’ (1953) argued that British economic power in the nineteenth century was extended across territories that were never formally colonised — Latin America, the Ottoman Empire, China — through trade, investment, and the threat of force. This distinction matters for debates about decolonisation: formal political independence does not necessarily end economic dependency.
Explanations of imperialism
Why did European states build empires? The major explanations include: economic (Lenin’s theory that imperialism was the highest stage of capitalism, driven by the need to export surplus capital); strategic and geopolitical (the ‘scramble for Africa’ driven by European competition rather than African economic value); cultural and ideological (the ‘civilising mission’, racism, the belief that European dominance was natural and beneficial); and peripheral (Robinson and Gallagher’s argument that imperial expansion was often driven by crises on the periphery rather than by metropolitan decisions).
How to use it in an answer
In essays on decolonisation, British imperial decline, or anti-colonial nationalism, demonstrating awareness of the formal/informal distinction and of the different explanations for imperial expansion shows conceptual sophistication. The most analytically precise essays treat imperialism not as a self-evident fact but as a phenomenon that requires explanation — and different explanations have different implications for how you assess decolonisation and its consequences.
Further reading: British Imperial Decline · Decolonisation · Anticolonialism · Postcolonialism
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