Yves René Marie Simon (14 March 1903 – 11 May 1961) was a French Catholic political philosopher.
Simon studied under Jacques Maritain at the Institut Catholique de Paris.
In 1938, he went to the University of Notre Dame in South Bend, Indiana, as a visiting professor.
[2] In 1975, Maurice Cranston called him one of the world's "most original and distinguished political theorists.
He was an ardent defender of the proposition that this traditional account was compatible with liberal democracy in the West, arguing that French Catholics had erred in holding that the Catholic faith supported their adherence to monarchy, à la Action Française.