I think it's likely that the civilizing effect of literature has done most of the work, and still continues to do. Look at Steven Pinker's book, The Better Angels of Our Nature: Why Violence Has Declined. It proves beyond any shadow of doubt that violence has declined dramatically throughout the centuries. There are various reasons for it: the rise of the state, Leviathan, the monopoly of violence, children's rights, animal rights. They're all positive signs.
Martin AmisCities at night, I feel, contain men who cry in their sleep and then say Nothing. It's nothing. Just sad dreams. Or something like that...Swing low in your weep ship, with your tear scans and sob probes, and you would mark them. Women--and they can be wives, lovers, gaunt muses, fat nurses, obsessions, devourers, exes, nemeses--will wake and turn to these men and ask, with female need-to-know, "What is it?" And the men will say, "Nothing. No it isn't anything really. Just sad dreams.
Martin AmisIf you feel you have a strong constituency among the young, you can really die happy, because the great unanswered question, the only valid value judgment is whether you're going to last, and that tells you that you are, for a bit at least.
Martin AmisWhen things are going well, you do have the sense that what youโre writing is being fed to you in some way. Auden compared writing a poem to cleaning an old piece of slate until the letters appear. The only way you could reveal your god is perhaps under hypnosis. Itโs sacred and itโs secret, even to the writer.
Martin Amis