Before checking your iPhone in line at the locally owned coffee shop was thought cool, long before counter culture became pop culture, and before the People’s Republic of Berkeley became the quintessential role model of liberal college students, hippie disgruntlement was a bloody affair. Unbeknownst to the present generation of Prius owners, in the 1970s the Symbionese Liberation Army (SLA), a group of militants, defined the anti-establishment attitude for which Berkeley has a reputation. A far cry from today’s idea of sticking it to the man by petitioning the Olympic committee to add Ultimate Frisbee as an official event, it...