Is there any scientific study of this possible association? There have been informal discussions and surmises, but a serious study with appropriate controls to cancel out extraneous factors is called for. The fact that vegetarians seem to be a small minority in the world as a whole poses some challenge. The fact that they are geographically concentrated in some parts of the world also poses a challenge.

There have been some discussions on Quora, for instance. Visit

https://www.quora.com/Is-it-true-that-non-vegetarians-are-more-violent-than-vegetarians

It is necessary to keep out social prejudices in any study.

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