@AthenasOwl 2008 is when SCOTUS incorporated 2A against States, removing many state-level gun laws. That coincided with the election of our first non-white president, which inspired a massive proliferation in gun-buying, with predictable consequences. Millennialism (various mythological notions about the Year 2000/1) may account for some of the late-century increase. Growing economic stress (mostly from trickle-down) likely contributes to workplace violence.