The claim that the morality of a society doesn't steadily, generally, and inexorably increase over time is not the same as the claim that there will be no examples of things that can be reasonably explained as increases in societal morality. If morality is an aggregate of bounded random walks, you'd still expect some of those walks to go up.
To return to the case at hand: the decline of lynching may be an improvement in one area, but you have to weigh it against the explosions in the imprisonment and illegitimacy rates, the total societal collapse of a demographic that makes up over a tenth of the population, drug abuse, knockout games, and so on.
To return to the case at hand: the decline of lynching may be an improvement in one area, but you have to weigh it against the explosions in the imprisonment and illegitimacy rates, the total societal collapse of a demographic that makes up over a tenth of the population, drug abuse, knockout games, and so on.
Do you think there's a causal connection between the decline of lynching and the various ills you've listed?
If it's worth saying, but not worth its own post (even in Discussion), then it goes here.