Atheist philosophers

Jürgen Habermas (UK: , US: ; German: [ˈjʏʁɡn̩ ˈhaːbɐmaːs] ; born 18 June 1929) is a German philosopher and social theorist in the tradition of critical theory and pragmatism. His work addresses communicative rationality and the public sphere.
Associated with the Frankfurt School, Habermas's work focuses on the foundations of epistemology and social theory, the analysis of advanced capitalism and democracy, the rule of law in a critical social-evolutionary context, albeit within the confines of the natural law tradition, and contemporary politics, particularly German politics. Habermas's theoretical system is devoted to revealing the possibility of reason, emancipation, and rational-critical communication latent in modern institutions and in the human capacity to deliberate and pursue rational interests. Habermas is known for his work on the concept of modernity, particularly with respect to the discussions of rationalization originally set forth by Max Weber. He has been influenced by American pragmatism, action theory, and poststructuralism.

Friedrich Albert Moritz Schlick (; German: [ʃlɪk] ; 14 April 1882 – 22 June 1936) was a German philosopher, physicist, and the founding father of logical positivism and the Vienna Circle.

John Anderson (1 November 1893 – 6 July 1962) was a Scottish philosopher who occupied the post of Challis Professor of Philosophy at Sydney University from 1927 to 1958. He founded the empirical brand of philosophy known as Australian realism.
Anderson's promotion of 'freethought' in all subjects, including politics and morality, was controversial and brought him into constant conflict with the august senate of the university. However, he is credited with educating a generation of influential 'Andersonian' thinkers and activists—some of whom helped to place Sydney in the forefront of the 'sexual revolution' of the 1950s and 1960s.
To Anderson, an acceptable philosophy must have significant 'sweep' and be capable of challenging and moulding ideas in every aspect of intellect and society.

Marcel Conche (French: [maʁsɛl kɔ̃ʃ]; 27 March 1922 – 27 February 2022) was a French philosopher and emeritus professor at the Sorbonne University (Paris).

André Comte-Sponville (born 12 March 1952) is a French philosopher.

Daniel Bensaïd (25 March 1946 – 12 January 2010) was a philosopher and a leader of the Trotskyist movement in France. He became a leading figure in the student revolt of 1968, while studying at the University of Paris X: Nanterre.