WILLIAM F. BUCKLEY, Jr. is more than a politically powerful Republican; he is a polysyllabic lecturer-debater, a popular syndicated columnist, the editor-in-chief of America's most famous conservative magazine, the host of TV's "Firing Line" program, and the author of numerous fiction and non-fiction books. A Renaissance Man in an age of mediocrity, Bill Buckley is admired by many, liberals included. But there is a dark side to this...