Born in Botosani (Romania), 1925
Decease on 2007 in Paris
Very active in: 60s, 70s, 80s, 90s, 2000s, Current decade

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Born into a Jewish family in Boto?ani, Isou started his carer as an avant-garde art journalist during World War II, shortly after the August 23 coup saw Romania joining the Allies (see Romania during World War II). With the future social psychologist Serge Moscovici, he founded the magazine Da, which was soon after closed down by the authorities.[1] He moved to Paris, having developed many concepts that intended as a total artistic renewing starting from their lower levels. He called himself a Lettriste, a movement of which he was initially the only member (at the age of 16 he had published the Manifesto in 1942) and published a system of Lettrist hypergraphics. Others soon joined him, and the movement continues to grow, albeit at times under a confusing number of different names.

In the 1960s Lettrist, Lettrist-influenced works and Isodore Isou gained a great deal of respect in France. The influential writer Guy Debord and the artist Gil J. Wolman worked with Isou for a while, before breaking away to form the Lettrist International, which latter merged with the International movement for an imaginist Bauhaus, and the London Psychogeographical Committee to form the Situationist International, a dissident revolutionary group. This is how Lettrist art influenced the posters, barricades, even clothing in the attempted revolution of 1968. Although it seemed a highly self-contained art in the post-war period, in 1968 it suddenly became more deeply involved in active social change than such movements as Existentialism and Surrealism, and came closer to producing actual transformation than these movements.

Isou's final public appearance was at the University of Paris on October 21, 2000.[2] Crippled by ill health, he remained house-bound until his death in 2007. Many of his works, and those of the other Lettrists, have recently been reprinted in new editions, together with much hitherto unpublished material, most notably Isou's very large La Créatique ou la Novatique (1941-1976)