Ignacy Sachs (17 December 1927 – 2 August 2023) was a Polish-born French economist.
He was 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.
He was an invited researcher in the Institut of Advanced Studies in University of São Paulo, and lived in Brazil between 1941 and 1953 as a war refugee.
He was one of the few Jews who returned to Poland (before his move to France) after World War II, which he did due to his communist convictions.
Its title is inspired on a short story written by Guimarães Rosa.