Above you blame America's not building on the "motive to get rich above all else", contrasting China. I'm saying only that this seems a strange and unsupported place to pin the blame, going by what actually changed in China and in America. I didn't say that more greed causes more building; I'm saying that more greed for profits, as a candidate cause for less building, is not a relevant thing that has changed in the relevant way. It seems closer to the opposite in what I know about China's history.

Are you saying you think China went from too-low profit motive to the Goldilocks zone, while America went from Goldilocks to too high? Or is this really about something other than profit motive?