Stills, now seventy-two, has often been named one of the top rock guitarists of all time and is the only musician to have recorded with both Jimi Hendrix and Eric Clapton on the same album—his first solo LP (1970). His work has sprung from every stripe of American music—blues, folk, rock, “songs with roots,” as he has put it; he was “Americana” and “singer-songwriter” before those terms were used.