Historian and Social Critic

Times obituary: Manning Marable, a leading scholar of black history and a leftist critic of American social institutions and race relations, whose long-awaited biography of Malcolm X, more than a decade in the writing, is scheduled to be published on Monday, died on Friday in Manhattan. Mr. Marable, a prolific writer and impassioned polemicist, addressed issues of race and economic injustice in numerous works that established him as one of the most forceful and outspoken scholars of African-American history and race relations in the United States.

Mr. Marable’s political philosophy was often described as transformationist, as opposed to integrationist or separatist. That is, he urged black Americans to transform existing social structures and bring about a more egalitarian society by making common cause with other minorities and change-minded groups like environmentalists..