Félix Guattari was a French philosopher and psychoanalyst known for his work in social theory and political activism. He is best recognized for his collaboration with Gilles Deleuze, particularly in their influential books, including "Anti-Oedipus" and "A Thousand Plateaus." Guattari's ideas often focused on the intersections of desire, capitalism, and social change. In addition to his philosophical contributions, Guattari was involved in various political movements and was a key figure in the post-structuralist movement. He emphasized the importance of ecology, not just in the environmental sense but also in terms of social and mental health, advocating for a more integrated approach to understanding human experience.