Soul music was born as a synthesis of the call-and-response traditions of gospel with the secular - and often sexual - appeal of rhythm 'n' blues. From its birth with Ray Charles's I Got a Woman to its ongoing and widespread appeal today, soul has spawned a huge number of America's most important popular figures. Sam Cooke, Otis Redding, Aretha Franklin, Marvin Gaye, Diana Ross, Al Green, Stevie Wonder, Michael Jackson, Prince and Whitney Houston...