Do - X - Machine

(...) The Greeks are important to this story. This is because, although they might've wanted God to come in when things got really messy, they did not hang around waiting for God to take vengeance. No, they managed it on their own, which was swifter (and better, probably). Whenever the Greeks murdered somebody, somebody else came along later and avenged the death. Then another Greek would come along and avenge the murderer. So that it went on and on, generation after generation, revenge after revenge. It all seemed fated to happen.  

 Martha Grimes, Cold Flat Jucntion
An Onyx Book, 2001