James abandoned sustained Pan-Africanist writing for three decades after 1939.

Evidence

James published A History of Negro Revolt. This was to be his last sustained statement on Pan-Africanism until the appearance of Nkrumah and the Ghana Revolution. It was, though, a minor piece, summarizing in historical shorthand some of the occasions of Black rebellion in the diaspora and Africa in the eighteenth, nineteenth, and twentieth centuries. It would prove to be of some use three decades later but it was casually written, more a public lecture than a study. — Cedric J. Robinson, Black Marxism_ The Making of the Black…, 1299