I do not think its reasonable to assume that being like rabid dogs is an actual physical state of human existence. It is more of a heuristic device to describe what can happen without institutionalized rules. If you want a more realistic description of what can happen - it is unlikely that lfiting the rules would automatically result in people running like mad dogs. More likely they would engage in interactions prety much the same way they did before. However, without rules, thatg interaction would quickly degenerate into a conflict. And when these conflicts would escalete, someone would step in and establish some rules which others would gladly accept to avoid future conflicts.
Wojtek