Ursula K. Le Guin was born Ursula Kroeber in Berkeley, California, on October 21, 1929. Her father, Alfred Louis Kroeber (1876–1960), was an anthropologist at the University of California, Berkeley. Le Guin's mother, Theodora Kroeber (1897–1979; born Theodora Covel Kracaw), had a graduate degree in psychology. She started writing in her sixties and became a successful author. Her best known work was "Ishi in Two Worlds" (1961). This was a biography of Ishi, an indigenous American who was the last known member of the Yahi tribe.