Marcuse published nothing for over a decade while working in Washington wartime agencies.

Evidence

Other Institut members spent a considerable part of their time in Washington during the war. Kirchheimer also joined the OSS, as did Marcuse after completing Reason and Revolution, his last extensive publication for more than a decade. Here they were members of a remarkable community of intellectuals, which included such distinguished scholars as Hajo Holborn, Norman O. Brown, Carl Schorske, H. Stuart Hughes, Leonard Krieger, Crane Brinton, and Franklin Ford. — Martin Jay, The Dialectical Imagination, 524