I don't know that I can agree with this assessment. Large-scale social norms change always seem impossible N years before they become so ingrained to seem unsh

I don't know that I can agree with this assessment. Large-scale social norms change always seem impossible N years before they become so ingrained to seem unshakable. So "impossible to imagine" strikes me as an uncharitable characterization. I can imagine that vegetarianism becomes a moral norm, and I can imagine how the change could happen, but that's entirely disconnected from my doubt it will happen. I also remember the time in my life when gay rights weren't the foregone conclusion they've been for the last 10 years. If we look at the distribution of shifting societal attitudes, there is going to be some threshold that turns things from "wishful thinking" to "probably going to happen." Without knowing what the information available at the time, and methodology used was generate the prediction, lying any blame at the feet of white/male/rich strikes me as applying a currently politically fashionable one size fits all explanation.