Catholic critics of Pinker’s Better Angels have pointed out that he doesn’t include abortion as an example of violence, and a fortiori he doesn’t include pill-induced abortifacients that prohibit implantation of fertilized eggs. There are other modern innovations that deserve mention: COFA lots for cattle, scientific animal testing, animal extinction caused by human expansion, factory farming (especially of chickens), lifelong prison terms, etc. My point isn’t to criticize Pinker’s thesis but to articulate a puzzle about recognizing violence. Violence is against one’s will, but (a) it is not clear how far willing extends and (b) even if we can figure this out, still, nothing is necessarily good because humans or animals want it, and so nothing is necessarily evil for contradicting desire.
(a) The first problematizes any sort of violence not inflicted on full-grown humans. I can make sense of causing animals pain, but is this acting against their will? One supposes that abortifacient pills don’t count as violence for the same reason: what sense is there to contradicting the will or desire of a single-celled organism? If this is violence, then antibiotics is genocide, right? I know intellectually that when I spray Raid in a room the mosquitoes and flies are dying a slow and painful death, but I honestly feel nothing about this. I know others who are bothered by killing mice with glue traps, but this causes (at most) a faint and momentary twitch on whatever meter measures my moral concern. So I know that I can tolerate some degree of slow and painful animal death, the question is simply a matter of drawing a line past which something deserves to be called “violence”. True, there are some easy calls, but this still allows for billions of instances of torture and death to fall into disputed territory, which is exactly the sort of thing that might problematize the thesis that violence is declining.
(b) The main difficulty is that violence is always condemned within a theory of justice. Sometimes cruelty is an easy call, but figuring out whether killing animals or non-sentient fetal humans is cruel and violent is much more dependent on our theory of justice. We are horrified when Pinker narrates the tale of a cat-burning, which apparently was a popular theater event a few centuries ago, but if we view the matter in cold logic we can sympathize with our ancestors who didn’t share our moral horror. If I can butcher a cow because I enjoy the steaks, why can’t I burn a cat because I’m amused by its screams? A cat, after all, is self-evidently a non-person, and everyone is familiar with arguments that take it as axiomatic that non-persons have no rights that a man is bound to respect.