- Aczel, Amir D. (10)
- Rigamonti, Gianni <1940- > (7)
- Sen, Amartya (4)
- Bernstein, Jeremy (2)
- Rhodes, Richard (2)
- Bolzano, Bernard (1)
- Elster, Jon (1)
- Feynman, Richard P. (1)
- Habermas, Jürgen (1)
- Hacking, Ian (1)
- Hempel, Carl G. (1)
- Quine, W. V. (1)
- Rawls, John (1)
- Rees, Martin (1)
- Scruton, Roger <1944-2020> (1)
- Walzer, Michael (1)