| Author | Keywords | Written works | Response |
|---|---|---|---|
| Lacan, | () | - | |
| Lafargue, | () | - | |
| Laing, | () | - | |
| Langer, Susan | () | - | |
| Laplace, | () | - | |
| Lasalle, | () | - | |
| Laurentius Valla | () | - | |
| Le Doeuff, Michele | () | - | |
| Leibniz, Wolfgang | () | - | |
| Lenin, Vladimir Ilyich | politics, communism, revolution | Materialism and Empirio-Criticism. Ch. 2: The thing-in-itself ; Ch. 5: The Recent Revolution In Natural Science And Philosophical Idealism (1908) On the significance of Militant Materialism (1922) |
- |
| Leucippus, | () | - | |
| Levinas, Emmanuel | () | - | |
| Levi-Strauss, Claude | () | - | |
| Liberation | () | - | |
| Liebknecht, | () | - | |
| Linnaeus, | () | - | |
| Locke, John | () | - | |
| Lorenz, | () | - | |
| Lucretius | () | - | |
| Lukacs, | () | - | |
| Lyotard, Jean-Francois | () | - |