Over 40 years ago, Daniel Bell made the provocative claim that ideological polarization was diminishing in Western democracies, but new ideologies were emerging and driving politics in developing nations. This article tests the EndofIdeology thesis with a new wave of public opinion data from the World Values Survey (WVS) that covers over 70 nations representing more than 80 per cent of the world's population. We find that polarization along the Left/Right dimension is substantially greater in the less affluent and less (...) democratic societies than in advanced industrial democracies. The correlates of Left/Right orientations also vary systematically across regions. The twin pillars of economic and religious cleavages remain important in European states; cultural values and nationalism provide stronger bases of ideology in Asia and the Middle East. As Bell suggested, social modernization does seem to transform the extent and bases of ideological polarization within contemporary societies. (shrink)