Why London's Population Exploded (1800–1880)

London grew from ~1 million to >4.5 million in eight decades. Seven interlocking forces drove this:

1. Industrial Revolution: Factories, docks, construction created massive labor demand.
2. Transport Revolution: Railways (1830s+) and canals slashed migration costs from countryside.
3. Agricultural Displacement: Enclosure Acts + mechanization ejected rural workers.
4. Demographic Surge: High birth rates + falling mortality (better sanitation, food) = natural increase.
5. Urban Magnetism: Culture (theatre, museums), education, politics, and perceived opportunity.
6. Irish Famine Migration (1845–52): Hundreds of thousands fled to London's East End.
7. Imperial Hub: Capital of a growing empire attracted colonial administration, finance, and trade.

The result: a chaotic, polluted, vibrant metropolis that defined the Victorian age.