Why is there no mass shootings in the third world?

The rate of civilian arm possession in the third world is similar to that in the US and still not organised or licensed at all. Drug abuse exists wildly, low income, there are many motives for maniacs to mass shoot. However it barely happened once or twice.

Whereas in high income population like the US it has become an annual routine! And when it happens the spectrum start blaming each other, between fascist and anarchist.

What does American youth think? Are libertarians right that government is the root of all evil? Do prescription drugs play part? Highly productive economies affecting general mental health? Is it because US automatic weapons seem like plastic toys. Why?
Why is there no mass shootings in the third world?
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