What the evidence shows

This study addresses a basic gap in climate behavioral science: while local and national surveys on climate attitudes are common, there was little globally representative data on people's actual willingness to bear a personal cost for climate action, nor on how people perceive others' willingness. The authors designed the Global Climate Change Survey to measure four related constructs — individual willingness to contribute income, approval of pro-climate social norms, demand for government action, and beliefs about the willingness of others — across 125 countries via the Gallup World Poll.

The core theoretical lens is "conditional cooperation": prior behavioral research suggests people are more willing to act on a collective problem when they believe others are also acting. The authors test whether this holds at a global scale, and — critically — whether people's beliefs about others' willingness are accurate or systematically distorted (a state referred to as "pluralistic ignorance").

The paper's central contribution is documenting both a high baseline of actual global support for climate action, and a large, near-universal gap between that actual support and what people believe their fellow citizens are willing to do — a misperception the authors argue is itself an obstacle to further climate action.

Key Findings

• There is a high demand for political and social action: roughly 89% of respondents call for stronger government climate action, while 86% support pro-climate social norms. This overwhelming majority often remains politically invisible due to a perception gap, wherein individuals hesitate to advocate for change because they mistakenly believe their peers do not share these views.

• There is a 26-percentage-point global gap between actual willingness to contribute (69%) and the average perceived willingness of others (43%) — people around the world systematically underestimate their fellow citizens' willingness to act. This gap is positive (i.e., underestimation) in all 125 countries and statistically significant in all but one.

• Willingness to contribute is higher in more climate-vulnerable and lower-income countries: it correlates negatively with GDP per capita (ρ = −0.47) and positively with both average temperature (ρ = 0.35) and an IPCC-based vulnerability index (ρ = 0.45). At the individual level, a 1-percentage-point increase in a person's perceived estimate of others' willingness is associated with a 0.46-percentage-point increase in their own likelihood of contributing — evidence for conditional cooperation.

Stand-out data points

• 0.46-point conditional cooperation effect: each 1-percentage-point increase in a respondent's belief about others' willingness predicts a 0.46-percentage-point increase in their own stated willingness to contribute

• 69% of the global population report they would be willing to contribute 1% of their household income monthly to fight global warming; another 6% would contribute a smaller amount; 26% would contribute nothing.

• 86% of respondents endorse the norm that people in their country should try to fight global warming; support exceeds two-thirds in 119 of 125 countries.

Examples of how Understories uses this research

• Actionability The conditional-cooperation finding suggests messages that inform audiences of others' actual willingness to act could be a concrete actionable tactic.

• Credibility Peer-reviewed, Nature-published, 125-country Gallup-administered representative sample of ~130,000 people — strong evidentiary weight for any claim about global public support.

• Hope Doom Balance  This is a strong evidence base for messages that counter doom-framing by emphasizing that a majority of people already support climate action — directly usable to correct "nobody cares" narratives.

• Non maleficence With care: 69% support for a hypothetical 1% income contribution is not the same as 69% support for any specific policy, and conflating the two could constitute a misleading claim. 

• Explainability Findings include specific percentages, correlation coefficients, confidence intervals, and country-level breakdowns, making them well suited to specific, cited scoring recommendations (e.g., citing the exact 26-point perception gap when scoring a message on Hope/Doom Balance).

— non-exhaustive.

Key quote

The authors describe the study's central worry: widespread global willingness to act is undercut by pervasive underestimation of others' willingness, a dynamic they liken to pluralistic ignorance operating at global scale.

© The Author(s) 2024 — CC BY 4.0

Last update: 3 September 2026

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