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Tom Rivett-Carnac describes stubborn optimism as grit in the face of an unavoidable challenge, not cheerfulness, and the research supports the distinction: Maria Ojala found hope based on denial predicted less pro-environmental behaviour among Swedish teenagers, while constructive hope predicted more

The phrase has a stricter meaning than everyday optimism, and the stricter meaning is the one the evidence supports. In a later two-country study worry predicted climate-friendly behaviour better than hope did, and hope contributed mainly where worry was already present.

By Terra Daily Editorial Team · Sep 10, 2026

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