"GIGO" comes to mind. While this is interesting in a way, overall the claim itself just isn't very meaningful.

It's not like "the peace of a country" can simply be measured. It can looked at in a great many different ways, and there can be agendas in every one of them. I'm a Christian and wonder if they measure personal peace in this, too, and how they would measure it. Anti-depressant use? Being addicted to shopping?

In the case of this study, you have to wonder about the organization's funding, the views of the people running it, and its goals, because all those things are going to affect the "findings," which seem quite arbitrary. Russia is less peaceful than China, for instance?

This "study" has Canada as a highly peaceful country, for example. But it doesn't take into account, apparently, that much of that peace is no doubt due to it being a neighbor and ally of the United States.

The study also is of the opinion that the U.S. Presidential election disturbed the nation's peace.

But we know that in personal relationships, such as in families, passionate discussion and debate can bring peace, as people express their concerns to each other. On the other hand, repressing those concerns most often leads to worse troubles. Democracy is set up on that principle - that conflict through debate, even when it upsets people, is better than ignoring problems, stifling speech, and other forms of conflict, like war.