“After Newtown, nothing changed, so don’t expect anything to change after Las Vegas.”

How often have you heard that said? Yet it’s not true. The five years since a gunman killed 26 at Sandy Hook Elementary School in Newtown, Connecticut, have seen one of the most intense bursts of gun legislation in U.S. history—almost all of it intended to ensure that more guns can be carried into more places.

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Since Newtown, more than two dozen states have expanded the right to carry into previously unknown places: bars, churches, schools, college campuses, and so on. The most ambitious of these laws was adopted in Georgia in April 2014. Among other provisions, it allowed guns to be carried into airports right up to the federal TSA checkpoint.

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So it’s not at all true that “nothing changes.” In fact, a remarkable research paper published in 2016 by Harvard’s Michael Luca, Deepak Malhotra, and Christopher Poliquin found that between 1989 and 2014, the most probable policy response to a mass shooting was a loosening of gun laws.

https://www.theatlantic.com/politics/archive/2017/10/more-killings-more-guns/541905/