"Dr. Nelli . . . describes the kinds of crime that prevailed in Italian immigrant enclaves in America; like most American crime, then as now, Italian crime was one aspect of the so-called culture of urban poverty--boys graduated from street gangs to criminal gangs. None of these gangs were very big until Prohibition brought the Great Leap Forward, to a level that Dr. Nelli calls 'entrepreneurial crime.' His fine account makes sense of many murderous...