It’s understandable why some people are concerned that there will be violence during or immediately after tomorrow’s presidential election. After all, for the entire final stretch of the campaign, Donald Trump has been pre-complaining that the results of tomorrow’s election will be “rigged,” and has repeatedly refused to say that he will accept the results, full-stop (well, he did say he’ll accept them if he wins). And while one can’t necessarily take the craziest things a given candidate’s supporters say at face value, some of his supporters have spoken openly and excitedly about the possibility of violence and revolution.

In a country as big as the U.S., with so many different polling places, the odds that there will be no isolated instances of violence tomorrow are pretty low. But should we be worried about more widespread violent conflict? One expert doesn’t think so.