How, precisely, do you define a police state? Is it the number of police per capita? How about the number of prisons? Police use of machine guns or armored personnel carriers? The use of the police or the military to put down strikes, or to otherwise "keep the trains running on time," as was Mussolini's specialty? Perhaps it's the use of the police or the military to halt civil unrest. Or maybe the widespread use of curfews. Arbitrary confiscation of private property. How about this: could a police state be defined, as in Nazi Germany, by the use of force to segregate members of a specific race into concentration camps or prisons?