Boy, I bet you are surprised about that, huh?
And for another not so surprising result of the study:
"The institute also found that peace has a major impact on the economy. If the U.S. had that same level of peacefulness as Canada, there would be a positive economic effect of over $361 billion, and it would generate 2.7 million jobs."
There's not really much to say about things like this. We all know they are true, but apparently there is nothing we can do about them.