The Other Divide: Polarization and Disengagement in American Politics, by Yanna Krupnikov and John Barry Ryan, Cambridge University Press, 250 pages, $28.99
With The Other Divide, political scientists Yanna Krupnikov and John Barry Ryan have made a significant contribution to the polarization debate. Wait! What debate? Everyone knows that Americans are more polarized now than at any time since the Civil War. There is no debate. The science is settled.