The Road to Mobocracy is the first major study of public disorder in New York City from the Revolutionary period through the Jacksonian era. During that time, the mob lost its traditional, institutional role as corporate safety valve and social corrective, tolerated by public officials. It became autonomous, a violent menace to individual and public good expressing the discordant urges and fears of a pluralistic society. Indeed, it tested the premises of democratic government.

Paul Gilje relates the practices of New York mobs to their American and European roots and uses both...