Art informel is the umbrella name for the gestural, material-led abstraction that dominated European art after 1945. Coined by the French critic Michel Tapié in 1950 and grouped abroad under names like tachisme and art autre, it rejected geometric abstraction's rationalism in favor of the direct physical act: paint dripped, smeared, thickened, or mixed with tar, sacking, and ash. Where American Abstract Expressionism worked big and mythic, informel artists - Fautrier, Wols, Dubuffet, Burri, Michaux - built small, encrusted, damaged surfaces that read as traces of the war years and the body. It was less a movement than a shared climate: a conviction that matter and gesture could carry meaning that premeditated form could not.