26. August 2026

Research: “Us-Versus-Them” Thinking Drives People’s Climate Action Press release: Research: “Us-Versus-Them” Thinking Drives People’s Climate Action

• Online survey experiment with 1,300 U.S. Americans

• EPoS Economic Research Center at Bonn and Mannheim publishes results

Bonn, Mannheim, 26.08. 2026 – This summer, many parts of the world suffer from severe effects of 
climate change. Despite this, voter support for specific climate policy measures tends to be rather weak 
and heterogenous. Why do some people support a carbon tax or international climate aid, while others 
reject the very same measures? A new study offers an answer that goes beyond classic explanations 
such as income, party preference, or factual knowledge: people’s moral outlook. The results show that 
people with a stronger universalist orientation — who think that moral obligations apply equally to 
everyone — are more likely to back ambitious climate action. The EPoS Economic Research Center at 
the Universities of Bonn and Mannheim publishes the findings in the discussion paper “Morality and 
Climate Policy Attitudes”.

Research: “Us-Versus-Them” Thinking Drives  People’s Climate Action
Research: “Us-Versus-Them” Thinking Drives People’s Climate Action © Florian Zimmermann
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“We map people’s moral orientation between two poles,” says Florian Zimmermann from the EPoS 
Economic Research Center. “A ‘universalist’ believes that moral obligations apply to everyone, not 
just the people close to us, such as our family or nation. At the opposite pole are what we call 
‘communitarians’ who tend to give moral priority to their own group.”

Findings: Moral outlook affects support for climate action

The researchers then compared people’s moral orientation with their views on climate action. The 
results show that people who score higher on the universalism measure are significantly more likely to 
support specific climate policies such as, for instance, a domestic carbon tax or a green infrastructure 
program. This holds even after the researchers accounted for factors, such as income, political 
affiliation, or skepticism about climate change. They conclude that people’s moral outlook appears to 
matter in its own right.

“Us versus them” mentality

Communitarians were less likely to support specific climate policies. Their written explanations 
revealed that communitarians disproportionately used group- or place-based reasoning, such as 
prioritizing help for their own country over people elsewhere. “Our results show that climate policy 
attitudes are not just a matter of economic self-interest or information gaps — they are in parts rooted 
in people’s moral worldviews,” says Zimmermann.

Gap between general support and support for specific policies

“The experiment furthermore confirms the pattern that support for ‘fighting climate change’ is high in 
general terms but drops substantially when individuals are asked about specific policies,” says 
Zimmermann. “The gap between abstract and concrete support is something policymakers should take 
into account.”

About the survey

Researchers s   urveyed about 1,300 U.S. adults online via the online survey provider Prolific, with a 
sample matched to the U.S. population on age, gender, and ethnicity. Participants completed a 
universalism measure, answered questions about their support for specific climate policies, and 
completed “who should pay” tasks. After each donation decision, participants explained their 
reasoning in their own words.

The presented discussion paper is a publication without peer review of the Collaborative Research Center Transregio 224 EPoS. Access the full discussion papers here.

Find the list of all discussion papers of the CRC here

Authors

Lasse S. Stötzer, IZA

Florian Zimmermann, Professor of Economics, University of Bonn and member of EPoS Economic Research 
Center 

Press Contact
econNEWSnetwork
Sonja Heer
Tel. + 49 (0) 40 82244284 
Sonja.Heer@econ-news.de

Contact 
Prof. Florian Zimmermann 
University of Bonn 
florian.zimmermann@uni-bonn.de

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