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THE AUTHOR ASSESSES THE CONTRIBUTION MADE TO POLITICAL SCIENCE SCHOLARSHIP BY "LEFT-RIGHT POLITICAL SCALES: SOME EXPERT JUDGMENTS," WRITTEN BY FRANCIS CASTLES AND PETER MAIR. IN THEIR ESSAY, CASTLES AND MAIR PROVIDED THE EMPIRICAL FOUNDATION FOR CROSS-NATIONAL LEFT-RIGHT POLITICAL SCALES.

I examine why contemporary social scientists on the political left are relatively pessimistic about the public arena and its trajectory. To develop an answer, I explore subsidiary questions: What is the evidence of social scientists' left pessimism? Why is left pessimism not the only plausible stance? Why is left pessimism problematic, and surprising? Why does it nonetheless occur? How can social scientists counter left pessimism?My evidence comes mainly from research on American racial and ethnic politics, and on the societal use of genomic science. I explain left pessimism as a result largely of the trajectory of social science research since the 1960s, and of the loss of faith in revolutionary inspiration after the fall of the Berlin Wall in 1989. I call on social scientists to reinvigorate optimistic visions, perhaps especially in a political era fraught with dangers to liberal democracy.

Research recently published in Political Psychology suggested that political intolerance is more strongly predicted by political conservatism than liberalism. Our findings challenge that conclusion. Participants provided intolerance judgments of several targets and the political objective of these targets (left-wing vs. right-wing) was varied between subjects. Across seven judgments, conservatism predicted intolerance of left-wing targets, while liberalism predicted intolerance of right-wing targets. These relationships were fully mediated by perceived threat from targets. Moreover, participants were biased against directly opposing political targets: conservatives were more intolerant of a left-wing target than the opposing right-wing target (e.g., pro-gay vs. anti-gay rights activists), while liberals were more intolerant of a right-wing target than the opposing left-wing target. These findings are discussed within the context of the existing political intolerance and motivated reasoning literatures. Adapted from the source document.

Research recently published in Political Psychology suggested that political intolerance is more strongly predicted by political conservatism than liberalism. Our findings challenge that conclusion. Participants provided intolerance judgments of several targets and the political objective of these targets (left‐wing vs. right‐wing) was varied between subjects. Across seven judgments, conservatism predicted intolerance of left‐wing targets, while liberalism predicted intolerance of right‐wing targets. These relationships were fully mediated by perceived threat from targets. Moreover, participants were biased against directly opposing political targets: conservatives were more intolerant of a left‐wing target than the opposing right‐wing target (e.g., pro‐gay vs. anti‐gay rights activists), while liberals were more intolerant of a right‐wing target than the opposing left‐wing target. These findings are discussed within the context of the existing political intolerance and motivated reasoning literatures.

Abstract Although left‐right scales are an inherent feature of much cross‐national research, they have necessarily been created on a somewhat ad hoc basis, since the empirical foundation for valid cross‐national scales rarely exists. This paper seeks to provide such a foundation by using judgements of party ideological position which are both explicit and non‐idiosyncratic across a wide range of countries. These judgements derive from a so‐called 'expert' survey of leading political scientists in Western Europe, the USA, and elsewhere. It is our hope that the scales which we derive in this way may prove useful in a wide variety of contexts of comparative research.