In examining the issue of gun control, the motives and/or causes (in addition to access to guns) are invariably raised in an attempt to identify the factors that lead to a mass killing, including whether an 'evil' gene could be identified, whether someone is shy and quiet, has suffered from a 'mental illness' or watched violent video games.
I would envisage separating and linking this part of the map becoming separate but linked to the main gun control map.
Other maps which examine these issues are:
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