These papers vividly chronicle Marcuse's increasing, yet reluctant estrangement from Max Horkeimer, director of the Institute for Social Research, and his years as an analyst with various U.S. government agencies. Marcuse's later attempts to link theory and practice in the 1960s and 1970s in regard to the New Left, National Liberation Movements and other new social movements were grounded in his work from the 1940s. As the 1940s witnessed the rise to global prominence of German fascism and the emergence of the Cold War, Marcuse strived to preserve the radical vision of his youth during a difficult historical period while many turned toward more conservative positions.