Riezler consequently played a crucial role in the 1930 inception of the Frankfurt School; for example, it was Riezler who recommended Herbert Marcuse to Max Horkheimer.
Riezler spillede derfor en afgørende rolle ved etableringen i 1930 af Frankfurterskolen; for eksempel var det Riezler, som anbefalede Herbert Marcuse overfor Max Horkheimer.