I would argue that gun control is a "local" problem so there is no need for uniform worldwide policy and regulation (unlike e.g. global tragedy of the commons p

I would argue that gun control is a "local" problem so there is no need for uniform worldwide policy and regulation (unlike e.g. global tragedy of the commons problems like global warming) Many countries have different rules for military/police and citizens when it comes to regulation of firearms. Extreme thought experiment: suppose technological breakthrough makes it possible for John Random Citizen to cheaply home manufacture a nuclear bomb / weaponized smallpox etc. understatement: it may be a good idea to heavily regulate this given that some tiny but nonzero fraction of citizens are violent/angry/suicidal. I'd draw the line well before this (but I'm not from north america)