Farming arose on multiple continents among populations with radically different cultures and environments and with no means ...

While On the Origin of Species does not address human evolution ... critics attack Darwin's theory for bestializing humankind. Thomas Henry Huxley, known as "Darwin's bulldog," tries to rally ...

During the Great Depression of the 1930s, existing economic theory was unable either to explain the causes ... British economist John Maynard Keynes spearheaded a revolution in economic thinking that ...