I think this is far less about violence vs non-violent nations etc. It is more a political and economical decision. The US spends huge amounts on military equip

I think this is far less about violence vs non-violent nations etc. It is more a political and economical decision. The US spends huge amounts on military equipments that's made by their own national manufacturers, so all that money also creates jobs in the US and pays taxes. Others spend way less, because they're not getting jobs or taxes back for it, so they only consider the needs in terms of defending their country. With virtually no conflicts around most countries that amount just isn't very high. Trump spouts a lot of hot air about Europe not doing their part, but that's more for internal politics to make him look tough and "America first" to the average American. On the European side of the water he is more and more just ignored, doesn't even make the media most of the time. Considering Trump is 73 years old, I'm sure he will be dead long before anything really changes in military spending by others. And deep down he also knows that, it's all political theater.