According to an OpEd in the NY Post by John Lott and Michael Weisser that cites a report by the Crime Prevention Research Center, America doesn't lead the world in mass shootings.
"Of the 86 countries where we have identified mass public shootings, the US ranks 56th per capita in its rate of attacks and 61st in mass public shooting murder rate. Norway, Finland, Switzerland and Russia all have at least 45 percent higher rates of murder from mass public shootings than the United States." (bolding mine)
I don't think it would be a particularly controversial claim to say that the US has lower gun violence rates (including lower mass shooting rates) than impoverished countries. However, the claim that Norway, Finland and Switzerland have higher mass shooting rates than the US leaves me skeptical due to the large disparity in overall gun violence.
Does the US not have a higher mass shooting rate than Norway, Finland or Switzerland? Do the above numbers, as presented, accurately depict the reality of mass shootings?