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New Zealand is a peaceful nation, but ongoing political tensions and inequities between Māori (the indigenous peoples of New Zealand) and Pākehā (the majority group of Europeans) persist as a result of its colonial history. Identifying ways to redress the enduring legacy of colonialism are therefore of critical importance. Accordingly, this paper examines data from 7017 Māori, as well as 37,233 Pākehā, to examine the impact of regional-level Pākehā warmth towards Māori on Māori support for progressive collective action. Results reveal that Pākehā warmth towards Māori varies markedly across 257 regional wards (regional units created for New Zealand electoral purposes). Moreover, multilevel modelling demonstrates that Pākehā warmth towards Māori at the region-level correlates positively with Māori identity and political efficacy at the individual level which, in turn, both correlate positively with collective action support. Collectively, these results demonstrate the impact of the broader social climate on social change, while identifying a previously-unknown facilitator of collective action support (namely, a broader context of warmth towards structurally disadvantaged groups).