Ignacy Sachs is a Polish-born French economist. He is considered to be an ecosocioeconomist for his ideas about development as a combination of economic growth, equalitarian increase in social well-being and environmental preservation. The term ecosocioeconomy was created by Karl William Kapp, a German economist and one of the authors who inspired the so-called political economy during the 1970s.
Professor Sachs taught at Paris XII University. Now Sachs is an invited researcher in the Institut of Advanced Studies in University of São Paulo - he lived in Brazil between 1941 and 1953 as a war refugee. He was one of the rare Jews who have returned to Poland after the World War II; he did it due to his communist convictions.