Cornelius Castoriadis
Cornelius Castoriadis ( ; 11 March 1922 – 26 December 1997 ) was a Greek-French philosopher , social critic , economist , psychoanalyst , author of "The Imaginary Institution of Society" , and co-founder of the "Socialisme ou Barbarie" group . 
<triplet> Cornelius Castoriadis <subj> 11 March 1922 <obj> date of birth <subj> 26 December 1997 <obj> date of death <subj> Socialisme ou Barbarie <obj> member of <triplet> Socialisme ou Barbarie <subj> Cornelius Castoriadis <obj> founded by