Basically, Sachs' thread shows a number of polls indicating rising American support for racial equality, gender equality, immigration, etc.
And I still think that.
Reason 1: American has grown more diverse, and we can't survive with a mostly white elite.
Our society has massively benefited from an influx of talented Asians, Middle Easterners, Africans and Hispanics in recent decades...
The system got less and less fair.
By the early 2010s it was impossible not to notice.
But because we didn't have a big war or other external shock (and we even avoided a second Great Depression), there was nothing to disrupt the increasingly unfair distribution of power and privilege in America.
I think that overall it will be the jerks.
And the rise of Trumpism means that powerful jerks are increasingly sorting into that movement. When it gets the boot, many of those jerks will too.
But the rate of improvement was far too slow, and economic gaps persisted.
So the Social Justice movement emerged to fight it.
The second was sexual harassment, which remained pervasive despite some progress.
Whatever you think of its particular tactics, the Social Justice movement is this shock.
In one sense, yes he is right. Social change WILL happen, in most of the ways SJWs want. The distribution of power WILL be more equalized. The elite WILL diversify. Sexual harassment WILL be more heavily discouraged.
The cultural revolutions of the 60s DID make America a less racist and sexist place than it was in the 50s, despite the backlashes of Nixon and Reagan.
And it'll be the same this time around, I predict.
But when the dust settles, it will be apparent that the change was evolutionary, not Revolutionary.
There will be many SJWs who will see this - or anything short of the utopian Revolution that they half-imagine - as a loss.
But it won't be.