Yglesias on why a progressive majority will always be transitory:
I would go stronger than that, actually, and posit that American politics in the future will mostly be dominated by a center-right political coalition just as it always has. This is just how things work. A political coalition grounded in the social mores of the ethno-sectarian majority and the ideas of the business class has overwhelming intrinsic advantages against contrary movements grounded in the complaints of minority groups and the economic claims of the lower orders. It’s a little bit hard to even know what a permanent progressive governing majority would mean, and harder to know how you would sustain it.