Throw a steak on the grill, stir a chilled Martini, and enjoy endless white-picket-fence prosperity. On the Hi-Fi this decade were Dean Martin, Frank Sinatra, Doris Day, and – for the youngsters – the Crew Cuts, trilling “Sh-Boom.” Skies were blue and worries were none. (Except, of course, for the rows of A-bombs the Ruskies had aimed at us, the fact that blacks couldn’t vote and women were hardly allowed in the workplace – but if you don’t talk about it, it’s not a problem, right?) But then came Elvis…