Chantal Delsol (also Chantal Millon-Delsol; born 16 April 1947) is a French philosopher, political historian and novelist. Founder of the Hannah Arendt research institute founded in 1993. Her work is inspired by Julien Freund and Pierre Boutang, as well as by her Catholic faith. She has described herself as a liberal-conservative. Her main political ideals are centered around liberalism, federalism, as well as the principle of subsidiarity based on the idea of singularity.