[Content Note: Guns; disablism.]
This piece by Adam Gopnik for the New Yorker about the simple solution to stopping gun violence is pretty great (although it does include some disablist language of the "using sane/crazy as synonyms for decent/indecent" sort).
I absolutely agree with the premise: There are complex institutional failures that lead someone to pick up a gun and start shooting, but the easiest and most sensible thing to fix is access to guns.
And I will make a side note that, even with Scotland's very tight gun laws, people who need guns (e.g. farmers) still have them. This narrative in the US that there's no way to balance serious gun reform against the necessity of owning rifles for farmers, subsistence hunters, etc. is bullshit. Of course that is possible.