This paper discusses how understanding the domestic political economy of climate governance is critical for developing informed strategies to build and sustain political ambition. It provides guidance and a methodology for domestic stakeholders to determine the types of institutional reforms, incentives, coalitions, and policy design that can entrench long-term political support for climate ambition. The assessment can also help users identify political barriers to more equitable climate action and identify reforms that may strengthen inclusion and accountability. EXECUTIVE SUMMARY Highlights ▪ There is overwhelming evidence of the social, economic, and environmental case to reduce greenhouse gas (GHG) emissions and rapidly scale up adaptation. Yet, despite a proliferation of climate laws and policies over the last 10–15 years, emissions are still rising, and adaptation needs remain urgent. ▪ This calls for a more sophisticated assessment of the political economy factors that may enable or constrain implementation of policies and actions and sustain political commitment at the country level. ▪ This guide offers an assessment methodology to understand how structural factors, rules and norms, stakeholders and interests, and ideas and narratives influence the political economy of climate action in a given country context. ▪ The methodology was developed on the basis of climate policy, governance, and political economy literature with contributions from subject matter experts. ▪ We intend the assessment to support civil society coalitions, reform-minded civil servants and politicians, international organizations, and other stakeholders. ▪ The resulting analysis should deepen the understanding of context while informing the advocacy, policy design, coalition building, capacity building, and communications of domestic stakeholders.

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