Where there are grazers there will be predators. They said that on Discovery last night in a documentary on undersea micro environments. I think it applies to human society as well.

Lyle Keeney
November 26, 2007
In the comments.
[Yup. There probably are some thresholds due to family and tribal type bonds but as soon as you get a large enough population of "not us" available as prey the predators materialize. I don't think the anti-gun bigots grasp that concept. It appears that they believe it's the availability of weapons not the availability of prey that "creates" the predators.--Joe]