James N. Druckman is professor of political science at the University of Rochester. Samara Klar is professor of political science at the University of Arizona. Yanna Krupnikov is professor of communication and media at the University of Michigan. Matthew Levendusky is professor of political science at the University of Pennsylvania. John Barry Ryan is associate professor in the Department of Communication and Media and the Department of Political Science at the University of Michigan.
""This interesting and timely book empirically assesses the dangers presented to American democracy by partisan hostility or animosity and ideological polarization."" * Choice * “Timely and rich, this is the best book yet written on partisan animosity in the United States. Harnessing impressive data, the authors convincingly show the powerful role of elected officials in magnifying tensions in the citizenry.” -- Sean J. Westwood | Dartmouth College “Although there's been extensive documentation of the existence of partisan animosity and affective polarization, there's been little research attempting to understand whether this behavior affects democratic governance. Through extensive data collection and rigorous research design, the authors show that partisan animosity won't lead to immediate democratic collapse but instead can lead to long-term erosion of norms.” -- Neil Malhotra | Stanford University