Along with most professional historians, Boyle rejects the commonly held assumption that a Berlin Wall separated the consensual 1950s from the divisive '60s. In the '50s, he demonstrates, amid repression, racism, anxiety and anger, boundaries were contested and occasionally broken. Inevitably, given the number of books on the 1960s, a lot of material in The Shattering will be familiar to readers. That said, Boyle enlivens his narrative with emblematic vignettes..