"From his pre-World War II days as Leon Trotsky's leading American apologist to his postwar role as mentor to William F. Buckley Jr. at National Review, James Burnham (1905-1987) was, at different times, one of America's most important intellectuals on both the Left and Right of the political spectrum. This researched volume, the first full-length biography of Burnham, should establish him as one of the twentieth century's outstanding thinkers."--BOOK JACKET.