Léon Bourgeois, French police officer and politician, 64th Prime Minister of France, Nobel Prize laureate (d. 1925)
Léon Victor Auguste Bourgeois (French: [leɔ̃ buʁʒwa]; 21 May 1851 – 29 September 1925) was a French statesman. His ideas influenced the Radical Party regarding a wide range of issues. He promoted progressive taxation such as progressive income taxes and social insurance schemes, along with economic equality, expanded educational opportunities, and cooperative solidarism. In foreign policy, he called for a strong League of Nations, and the maintenance of peace through compulsory arbitration, controlled disarmament, economic sanctions, and perhaps an international military force.

1851May, 21
Léon Bourgeois
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Events on 1851
- 12Feb
Australian gold rushes
Edward Hargraves announces he has found gold in Bathurst, New South Wales, Australia, starting the Australian gold rushes. - 11Mar
Giuseppe Verdi
The first performance of Rigoletto by Giuseppe Verdi takes place in Venice. - 21May
Colombia
Slavery is abolished in Colombia, South America. - 5Jun
Uncle Tom's Cabin
Harriet Beecher Stowe's anti-slavery serial, Uncle Tom's Cabin, or Life Among the Lowly, starts a ten-month run in the National Era abolitionist newspaper. - 24Oct
Umbriel (moon)
William Lassell discovers the moons Umbriel, and Ariel, orbiting Uranus.