Jean-Antoine Gleizes | |
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| Born | Jean Antoine Gleïzès 26 December 1773 |
| Died | 17 June 1843 (aged 69) Mazères, Ariège, France |
| Occupation(s) | Philosopher, writer, activist |
| Known for | Advocacy of vegetarianism |
| Notable work | Thalysie: ou la Nouvelle Existence |
Jean-Antoine Gleizes (26 December 1773 – 17 June 1843) was a French philosopher, writer, and early advocate of vegetarianism. He was extremely popular and influential at his time. His best known work is Thalysie: the New Existence.