http://www.marxists.org/archive/james-clr/works/1967/black-power.htm

Relevant parts:

(from a letter James wrote to Stokely Carmichael) One of my most important and pregnant experiences is my experience both personal and otherwise of West Indians and people of West Indian origin who have made their way on the broad stage of Western civilization. Some of them I knew very well personally and others I have studied, am very familiar with their work, and have systematically added to my information and knowledge about them from people who knew them well. They are Marcus Garvey, George Padmore, Aimé Césaire, Frantz Fanon. These are West Indians who have played a role on the world political stage that is not even properly understood by their own people. One of the tasks I have set myself is to make people understand what these men have done and their significance in world politics. In a substantial respect I am one of them, although I have not played the concrete role that they have played: I say that I am one of them because it means that I understand the type very well. And you are one. I suspected it when I was reading some of your writings and having heard you I am absolutely certain of it.

And:

Now you notice that Booker T. Washington was from the South of the United States. W.E.B. Du Bois was South and North, everywhere, and in the world outside: his was a universal mind. But the West Indians, Garvey, Césaire, Padmore and Fanon, all worked abroad, away from home, and much of their work, in fact most of it, was concerned with Africa. And taking advantage of this immense political experience which has been accumulated, and the advanced stage of American society, we find that it is in the United States that the Negro struggle has advanced and is now taken to the highest peak it has ever reached. For note that whereas the others on the whole concentrated on Africa and peoples of African descent, in the voice of Stokely we can hear that they are laying the basis of a mortal struggle to the death for what black people believe to be their rights.