Psychedelic rock, prog rock, glam rock, hard rock, folk rock. From 1965 to 1975, owing to the widespread availability of record players and portable radios, and an extensive network of venues in which performances were regularly held, rock 'n' roll reached its undoubted peak, steaming ahead and fulfilling its destiny as a vital, unstoppable force. A counterculture of young people took shape, with rock 'n' roll as its foundation (and with The Beatles tunefully reigning as its benign monarchs), pledging itself to a peaceable outlook and standing in scornful opposition to the shallow values, threadbare lies, virulent prejudices, unyielding authority, unctuous hypocrisy, and needless wars of the older generation. The musicians who played rock 'n' roll were no longer looked upon as mere entertainers, artificial characters fitted out with guitars and mod apparel, brainless puppets who were required to do no more than throw bunches of catchy trifles to pliant hordes of...