States laws limit local control over guns, favor gun rights

The majority of U.S. states have passed laws preserving state authority over firearms policies—and preventing local communities from passing their own—but at the same time have refrained from enacting statewide gun-control ...

Why mass shootings don't lead to gun control

Mass shootings happen with numbing frequency in the United States. Despite the extraordinary tragedy of these events, such as the shooting at Columbine High School twenty years ago this week, little progress has been made ...

The tipping point for legislative polarization

A predictive model of a polarized group, similar to the current U.S. Senate, demonstrates that when an outside threat—like war or a pandemic—fails to unite the group, the divide may be irreversible through democratic ...

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