J. B. S. (John Burdon Sanderson) Haldane

Born in Oxford in 1892, J. B. S. Haldane grew up in a scientific household and joined experiments from an unusually young age. He studied at Eton and New College, Oxford, served in the First World War, and went on to become one of the key figures who united Darwinian natural selection with Mendelian genetics.

Haldane worked across genetics, physiology, statistics, and evolutionary biology, and he was also one of the great popular science writers of his time. Books such as The Causes of Evolution helped shape modern evolutionary thought, while his essays made difficult scientific ideas lively, funny, and accessible.

Later in life he left Britain for India, where he continued his research and eventually became an Indian citizen. Remembered as much for his bold personality as for his scientific range, he remains a central figure in the story of twentieth-century biology.