Abstract
The recent increase in support for populist candidates in elections across the world has received considerable attention and is of broad scientific and public interest. Two of the most common explanations for this surge are that populism is a consequence of fundamental changes in the workforce stemming from globalization and that it is a cultural backlash to rapid changes in societal values. Here, we test what we call ‘the social isolation hypothesis,’ which hypothesizes that the rise in support for populism is produced by a decline of social capital which increases loneliness and undermines mental health. Using longitudinal census, mortality, and election data, we find that changes in variables related to social isolation—deaths from suicide or alcohol, and an overall decline in social capital—predict support for populist candidates. This supports the idea that the deterioration of the strength of social relationships can affect voting behavior.
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Data availability
The data that were used to generate these results and that support the findings of this study are available on Github.
Code availability
The code used to produce these models, generate all results, and produce all of the figures and tables in this manuscript and the supplementary information is available on Github.
Notes
Although none of the presidential candidates from either major political party were considered to be populist in 2008 or 2012, the popularity of Republican presidential candidate John McCain’s running mate Sarah Palin is widely seen as an important early sign that populist candidates were beginning to gain support in the aftermath of the 2008 financial crisis (Moffitt and Tormey 2014).
Results were similar if parameter estimates were standardized by multiplying them by the standard deviation of their observed range (Cohens d) (Rice and Harris 2005) (see Supplementary materials Table S5)
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Acknowledgements
We would like to thank Mamaroneck High School Open Science Research teachers Guido Garbarino and Alejandro Victoroa for their support and Dave O’Brien and Karthik Panchnathan for helping to edit the manuscript.
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RL wrote the first draft of the manuscript, conducted the statistical analysis, and created the figures and tables. NL conceived of the idea, collected the data, and helped write the manuscript. SC, MB, and EL helped to edit the manuscript and SH helped to edit the manuscript and offered statistical guidance.
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Lynch, R., Lynch, N., Chapman, S.N. et al. Support for populist candidates predicted by declining social capital and an increase in suicides. SN Soc Sci 2, 80 (2022). https://doi.org/10.1007/s43545-022-00373-0
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DOI: https://doi.org/10.1007/s43545-022-00373-0