experiences of four generations within that span. the next turning, he predicts, is due in about 2033. it will resemble those in the 1760s, 1850s, 1920s, howe writes that produced bone-jarring crises that american society emerged wholly transformed. why did you find that predictive? >> i don't know if it's predictive, but it's interesting. i thus it's probably a little overdrawn. maybe sort of forcing facts into a theory that he has. back to your first question, it's worth reading because it teaches a lot of history. it teaches that these sorts of crises do happen. and it may have the elements of the next one right in front of us. >> governor, you also write that social cohesion tends to come from matters of crises like that, which worries you. i'm not convinced that's going to happen. jeff greenfield, the deep-thinking historian, looked