‘… More of Keynes and Less of Milton Friedman!’ 1

This paper gives an account of the scientific work of a pioneer whose heterodox ideas stimulated debate in development economics for more than three decades. It will be shown that his intellectual biography—in particular, his experiences as a victim of National Socialism—provided an important stimulus for his commitment to the problems of the socially underprivileged. This led him to initiate several studies of unemployment in the depressed areas of Great Britain during the Great Depression and the Second World War. Then, starting from the late 1940s, during the years of his affiliation with the UN, he made pathbreaking contributions to the economics of underdevelopment in fields such as the deterioration of terms of trade, the basic needs strategy, and food security. The topics will be discussed both in the context of history of thought and with regard to recent work in development economics.