| Author | Keywords | Written works | Response |
|---|---|---|---|
| Mach, | () | - | |
| Machiavelli, Niccolo | () | - | |
| Malthus, | () | - | |
| Mao Tse-Tung | () | - | |
| Marcus, Ruth Barcan | () | - | |
| Marcuse, Herbert | () | - | |
| Maritain, Jacques | () | - | |
| Marshall, | () | - | |
| Marx, Karl | political economy, materialism | The German Ideology: Idealism and Materialism (1845, with Engels) Private Property and Communism (1844) |
- |
| Materialist conception of history | () | - | |
| Matheolus | () | - | |
| Maths | () | - | |
| McKenna,Jed | spiritual enlightenment | Spiritual Warfare (2008) | - |
| Mead, George Herbert | () | - | |
| Mead, Margaret | () | - | |
| Mehring, | () | - | |
| Merleau-ponty, Maurice | () | - | |
| Midgley, Mary | () | - | |
| Mill, | () | - | |
| Millett, Kate | () | - | |
| Millikan, Ruth | () | - | |
| Monad | () | - | |
| Monod | () | - | |
| Montaigne, Charles | () | - | |
| Montesquieu, | () | - | |
| Munzer, | () | - | |
| Murdoch, Iris | () | - |