William Stanley Jevons was an English economist and logician, known for pioneering the Marginalist Revolution and for his use of the differential calculus in economics. William Stanley Jevons (1835-1882) was born in Liverpool to a wealthy merchant family. He entered  University College London , but due to the bankruptcy of the family businesses, he had to withdraw from studies and travel to Sydney, Australia to work for several years at the Mint.

Zumbi dos Palmares - Biography, History, Brazil Black Slavery ( 1965) Biography of Zumbi dos Palmares Zumbi dos Palmares was the leader of the black resistance of Quilombo dos Palmares, located to the south of the Captaincy of Pernambuco, on the lower part of the São Francisco River, in Serra da...