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Ultimately, it seems like science should judge whether playing violent video games can lead to a propensity for violence in the real world.
CNN: John D. Sutter,
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But even if we clamped down on the US right to keep and bear arms as severely as we have clamped down on that right within the prison population, you still would be faced with that population of people, with their propensity for violence, in the general population.
FORBES: Only Criminals Have Guns
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Almost all of the traits considered to be masculine big muscles, facial hair, square jaws, deep voices and a propensity to violence evolved, it now seems, specifically for their usefulness in fighting off or intimidating other men, allowing the winner to get the girl.
ECONOMIST: Masculine traits