Félix José Weil (German: [vaɪl]; 8 February 1898 – 18 September 1975) was a German-Argentine Marxist and patron, who provided the funds to found the Institute for Social Research in Frankfurt am Main, Germany, the institute later originated the Frankfurt School.
Like Theodor W. Adorno, he belonged "to the generation of intellectuals born around the turn of the century and from bourgeois, mostly Jewish families, who were attracted in the 1920s to a philosophical Marxism beyond the workers' parties".
[2] Felix Weil married Käthe Badiert and moved to Argentina, his country of birth, for a year.
In 1923 he financed the Erste Marxistische Arbeitswoche ("First Marxist Workweek"), a conference in the German town of Ilmenau.
The success of this event led him and his friend Friedrich Pollock to, with the help of an endowment from his father, found the Institute for Social Research in 1923.