Hier mal wie es in der "permissiven, liberalen Gesellschaft" New Yorks zuging:

New York City homicides per 100,000 (solid line) and age standardized rates (broken line), 1820-1990. Source : see text.

Der Peak von 1860: We see that New York has a bulge of men in the age group 18 to 35, just the age at which we expect to see more criminal violence.

Male age distributions, New York (1850) and Turin (1705)

Quelle: Quelle