Alan Berkman (1945-2009) was no campus radical in the mid-1960s; he was a promising Ivy League student, football player, Eagle Scout, and fraternity president. But when he was a medical student and doctor, his politics began to change, and soon he was providing covert care to members of revolutionary groups like the Weather Underground and becoming increasingly radicalized by his experiences at the Wounded Knee takeover, at the Attica Prison uprising,...