The USA should do, perhaps, four fifths of that. Despite having 4% of the world's population it has 25% of the world's prisoners, and one of the highest crime rates in first-world countries so it'd obviously not working.
They could also consider banning substances that make people more aggressive... There's a particular artificial pesticide whose name I don't remember, which is coincidentally banned in all the places with much lower crime rates, and has been shown to alter behaviour in monkeys.
They could also consider banning substances that make people more aggressive... There's a particular artificial pesticide whose name I don't remember, which is coincidentally banned in all the places with much lower crime rates, and has been shown to alter behaviour in monkeys.