人口論
In 1795, Condorcet's book "Sketch for a Historical Picture of the Progress of the Human Mind" was published after his death by his wife Sophie de Grouchy. It dealt with theoretical thought on perfecting the human mind and analyzing intellectual history based on social arithmetic. Thomas Malthus wrote "An Essay on the Principle of Population" (1798) partly in response to Condorcet's views on the ""perfectibility of society"."