CHRIS WRIGHT—How can society ever get to this point? Evidently only through upheavals so painful that it becomes clear there is no other option. Revolutionary change on such a scale happens only by means of unprecedented crisis, which is to say social discontent so extreme that half-measures are cast aside as pitifully inadequate. As long as a large middle class exists to serve as a bulwark of social stability and relatively conservative politics, the requisite crisis will not happen. Society has to polarize between a tiny minority of ultra-rich and a huge majority of unprotected, insecure, ecologically vulnerable, politically desperate people whose violent discontent propels the “revolution” forward.