One an observant, mystically inclined Jew, born to wealthy, pedigreed parents outside Montreal, a poet by training and temperament, handsome, charismatic and refined, who drifts down to New York City in his early 30s to shore up a wobbly career by throwing himself into songwriting. The other from rural Alabama, the son of uncultured, unmoneyed teenage parents whose loud and bitter fighting drives the pudgy and awkward boy to his room, where he teaches himself electric guitar in order to drown out the noise and his own rage and sorrow. One born in 1934, full of questions, indignation and ardor…