The connection between moral positions and moral arguments drives opinion change

Pontus Strimling (), Irina Vartanova, Fredrik Jansson and Kimmo Eriksson
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Pontus Strimling: Institute for Futures Studies
Irina Vartanova: Institute for Futures Studies
Fredrik Jansson: Stockholm University

Nature Human Behaviour, 2019, vol. 3, issue 9, 922-930

Abstract: Abstract Liberals and conservatives often take opposing positions on moral issues. But what makes a moral position liberal or conservative? Why does public opinion tend to become more liberal over time? And why does public opinion change especially fast on certain issues, such as gay rights? We offer an explanation based on how different positions connect with different kinds of moral arguments. Based on a formal model of opinion dynamics, we predicted that positions better connected to harm and fairness arguments will be more popular among liberals and will become more popular over time among liberals and conservatives. Finally, the speed of this trend will be faster the better the position connects to harm and fairness arguments. These predictions all held with high accuracy in 44 years of polling on moral opinions. The model explains the connection between ideology and moral opinions, and generates precise predictions for future opinion change.

Date: 2019
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DOI: 10.1038/s41562-019-0647-x

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