Pierre-Félix Guattari (April 30, 1930 – August 29, 1992) was a French psychotherapist, philosopher, semiologist, and activist. He founded both schizoanalysis and ecosophy, and is best known for his intellectual collaborations with Gilles Deleuze, most notably Anti-Oedipus (1972) and A Thousand Plateaus (1980), the two volumes of Capitalism and Schizophrenia.
Source: Felix Guattari on Wikipedia (CC BY-SA 3.0).