Question: What is the birthdate of this American writer and political activist who became an early leader of the Black Panther Party and for whom Maxwell Geismar wrote the introduction to his "Soul on Ice"?
Sentence (from "Eldridge Cleaver"): His 1968 book, "Soul On Ice", is a collection of essays that, at the time of its publication, was praised by "The New York Times Book Review" as "brilliant and revealing".
Relevant evidence: No