The self-taught printer who asked why poverty deepens as progress advances — and traced the answer to the ownership of land.
The founder of modern nursing, who fought preventable death with mortality tables and ran an empire's sanitary reform from her sickroom.
He moved the Earth to rescue the ancient circles — and produced a scheme that was more coherent, no more accurate, and thirty-six years late.
She wrote Europe's most admired treatise on humane legislation, and in the same decade made it a flogging offence for a serf to complain about a master.