The vast, vast majority of districts in the US respond to every single 911 call reporting anything of consequence. Maybe there are still "a lot" of places wher

The vast, vast majority of districts in the US respond to every single 911 call reporting anything of consequence. Maybe there are still "a lot" of places where that's not true, but I think that phrasing misrepresents the state of policing in the US. Many things scale favorably in larger cities: people served/foot of water & power lines, street maintenance, etc. But adequate policing seems to scale at a flat or maybe even inverse rate: the tighter people are packed the more police presence per person is needed to keep the "peace" constant and crime solve rates low. (Admittedly, the above is at best anecdata from having lived in many larger and small cities in the US and abroad.)