Berlin has undergone more change than any other European capital, and some of those changes breed conflict. The parties to Berlin's conflicts are divided by age, ethnicity, economic status, and political beliefs: recent immigrants trying to find a place in a society that was not only closed but murderously hostile just a few decades ago; ethnic Germans trying to remake themselves and their city in the image of the tolerant and democratic West; young people trying to find ways of earning a living that are consistent with their values; and a few older Germans who are returning to the city after decades in exile. Neo-Nazi groups and their covert sympathizers are in conflict with those who believe in an open and tolerant society; older, retired Berliners are often in conflict with younger workers who resent the size of their pensions; the leaders of large...