Moyer, Jonathan D., & Meisel, Collin J. (2026, March 16). “Climate change modelling and international relations: in pursuit of an integrated, long-term research agenda” in Handbook on the Geopolitics of Sustainability. (pgs. 368-378). Edward Elgar Publishing.

In this book chapter, Pardee Institute Director Jonathan Moyer and Director of Analysis Collin Meisel, identify a crucial disciplinary gap between international relations theory and climate change modelling. To help bridge this divide, Moyer and Meisel call for an integrated research agenda that aligns international relations with the long-term, large-scale quantitative forecasting models utilized by climate researchers. By incorporating a “systems map” approach, researchers can establish a baseline forecast of the international system to test the complex, interacting geopolitical impacts of direct climate effects, mitigation, and adaptation.

Explore the full chapter here.

What is the real price tag of delaying climate and nature action by another year—or another decade? 

The United Nations Environment Programme’s 7th Global Environment Outlook (GEO-7) explores this question. Launched on December 9, 2025, at the seventh UN Environment Assembly (UNEA-7) in Nairobi, Kenya, GEO-7 is the most comprehensive scientific assessment of the global environment to date. Produced by 287 multidisciplinary scientists from 82 countries and reviewed by more than 800 experts and 56 review editors worldwide, the report reflects an effort of remarkable scale, ensuring scientific credibility and global representation.  

The price tag – measured in human and economic costs – of failing to achieve transformative change is steep. GEO-7 finds that continued environmental degradation will drive growing economic losses and could cost tens of millions of lives over the coming decades. Pollution, climate change, biodiversity loss, and land degradation are already leading to devastating environmental, economic, and human impacts. The outlook emphasizes that these crises are deeply interconnected and that addressing them will require integrated, system-wide solutions across regions and within national governments and societies.  

Crucially, GEO-7 underscores that this future is not inevitable. The report maps out two “Transformation Pathway” scenarios – alternative ways that societies might achieve global environmental goals while supporting economic prosperity. The technology-focused transformation focuses on technological development and efficiency gains. The behavior-focused transformation illuminates how shifts in values and material consumption patterns could drive change. Together, these pathways explore how structural change in energy, food systems, land use, materials and waste, and finance could alter long-term outcomes. 

Taylor Hanna, Associate Director of Development Analysis at the Pardee Institute, and Jonathan Moyer, Director of the Pardee Institute, served as lead authors on Chapters 10 and 11. These chapters map the global implications of the continuation of current trends (Chapter 10) and the pursuit of transformation pathways (Chapter 11). They draw on the Pardee Institute’s International Futures (IFs) model, used alongside other global environmental and economic models, to explore long-term trajectories for economic, agricultural, and energy indicators.  

The Sustainable Development Goals (SDGs) call for global partnerships, recognizing that ending poverty is linked to progress in education, energy, and health. The IFs model suggests that under current trends, the world will achieve only modest well-being improvements and miss many SDG targets. Many will still lack basic needs, and disparities between high-income countries and others persist. This highlights an opportunity for countries to align strategies with sustainability and improve well-being. Scenario analysis shows where integrated policies can close gaps and foster inclusive progress. 

By contrast, the Transformation Pathways mapped out in GEO-7 suggest meaningful progress is possible –not only toward global climate goals and stronger economic growth, but also toward improved human well-being worldwide. In the modeling, these pathways lift more than 100 million people out of extreme poverty, 200 million out of hunger, and prevent 9 million premature deaths relative to Current Trends. 

This is the third GEO assessment to which the Pardee Institute and the IFs model have contributed, following earlier involvement in GEO-4 and GEO-6. By contributing to successive GEO assessments, the Pardee Institute continues to provide systems-based long-term analysis as part of a wider international effort to link environmental science with policy decisions. You can access the full GEO-7 report here and view background information, including press releases and the report timeline.  

Sahadevan, D., Irfan, M. T., Luo, C., Moyer, J. D., Mason, C., & Beynon, E. (2025). Charged for change: The case for renewable energy in climate action. UNDP; Pardee Institute for International Futures; Octopus Energy.

Andrijevic, M., Zimm, C., Moyer, J.D., Muttarak, R., et al. (2025, February 4). Representing gender inequality in scenarios improves understanding of climate challenges. Nature Climate Change. 15, 138–146. https://doi.org/10.1038/s41558-024-02242-5

Achieving gender equality can increase societies’ capacities to deal with climate change. Here we highlight empirical connections between gender equality and climate change adaptation and mitigation to propose a structured and detailed inclusion of gender-related aspects in the Shared Socioeconomic Pathway framework. The introduction of hypothetical pathways of gender (in)equality in the scenario space can help analyse interactions with other socioeconomic drivers and subsequent implications for adaptation and mitigation options. The extent of challenges to climate change adaptation and mitigation may substantially change depending on the rate at which societies progress towards equal access to resources and opportunities for self-realization for all genders. We propose steps that the scenario community could take to enrich the next generation of socioeconomic pathways.

Hanna, T., Kruczkiewicz, A., Owen, M. (2024, December 10). Land degradation and human development in Yemen. United Nations Development Programme. https://www.undp.org/yemen/publications/land-degradation-and-human-development-yemen

This study, “Land Degradation and Human Development in Yemen,” was commissioned by UNDP in 2024 as part of a collaboration with the Frederick S. Pardee Institute for International Futures, Josef Korbel School of Global and Public Affairs, University of Denver and climate researchers. Yemen is frequently said to be experiencing one of the worst development and humanitarian crises in the world after more
than ten years of ongoing conflict. At the same time, it is among the countries most vulnerable to climate change and for decades has faced a worsening water crisis as well as land degradation (including deterioration of historical terracing systems), desertification and soil erosion. This report seeks to better understand how the above-mentioned phenomena could affect economic and human development in Yemen on immediate, medium and long-term timescales.

The report explores the links between climate change, land degradation and desertification, conflict, and human development outcomes in Yemen. This report begins with a review of the literature of the drivers, context, and intervening factors around land degradation and desertification in Yemen so far. This is followed by an analysis of historical subregional data on land degradation and climatic variables within
the country. Turning toward the socioeconomic effects, the report first reviews literature on the pathways through which desertification can alter agricultural production and otherwise affect economic and human development. Finally, the report uses integrated modelling techniques and scenario analysis using the  International Futures (IFs) model to explore the effect of degradation and restoration pathways on future development in Yemen. The IFs model has previously been applied to assess the effect of ongoing conflict in Yemen on human development and to examine possible recovery pathways in the Impact of War trilogy of reports and the Impact of Climate Change on Human Development produced by UNDP and the Frederick S. Pardee Institute for International Futures.

Carbon bargain: The energy transition will be much cheaper than you think. (2024, November 16). The Economist.

Abidoye, B., Banda, A., Baumwoll, J., Carman, R., Moz-Christofoletti, M., Orlic, E., Patterson, L. (2024). Advancing the SDG Push with equitable low-carbon pathways. UNDP. https://www.undp.org/publications/advancing-sdg-push-equitable-low-carbon-pathways

The ‘SDG Push x NDC 3.0’ research, a collaboration between UNDP and the Frederick S. Pardee Center, outlines a framework for a fair, low-carbon energy transition that considers the needs of both wealthy and lower-income nations. The report updates the second flagship publication, Leaving No One Behind: Impact of COVID-19 on the Sustainable Development Goals (SDGs), examining an integrated set of policy strategies that accelerates climate actions while promoting human development. By supporting equitable access to energy, green investments, and digital infrastructure, it aims to foster inclusive, sustainable growth and align with the Paris Agreement targets.

The research finds that an additional 60 million people could be lifted from poverty by 2030, and upwards of 175 million people by 2050, through these ambitious, yet feasible policy choices. In addition, nine out of ten low-human development countries could make significant strides towards improving their current development outcomes by 2050 while carbon emissions are reduced by two-thirds by 2050.

Burgess, M. G., Van Boven, L., Wagner, G., Wong‐Parodi, G., Baker, K., Boykoff, M., Converse, B. A., Dilling, L., Gilligan, J. M., Inbar, Y., Markowitz, E. M., Moyer, J. D., Newton, P. W., Raimi, K. T., Shrum, T. R., & Vandenbergh, M. P. (2024, January 16). Supply, demand and polarization challenges facing US climate policies. Nature Climate Change. https://doi.org/10.1038/s41558-023-01906-y

The United States recently passed major federal laws supporting the energy transition. Analyses suggest that their successful implementation could reduce US emissions more than 40% below 2005 levels by 2030. However, achieving maximal emissions reductions would require frictionless supply and demand responses to the laws’ incentives and implementation that avoids polarization and efforts to repeal or undercut them. In this Perspective, we discuss some of these supply, demand and polarization challenges. We highlight insights from social science research, and identify open questions needing answers, regarding how to address these challenges. The stakes are high. The success of these new laws could catalyse virtuous cycles in the energy transition; their failure could breed cynicism about major government spending on climate change.

United Nations. 2024. Global Risk Report. New York: United Nations.

The Frederick S. Pardee Institute for International Futures conducted a detailed, risk-by-risk assessment to refine the initial list of over 100 risks identified for the report. This assessment involved defining each risk, reviewing existing literature, estimating the likelihood of each risk by 2050, and analyzing potential impacts. Furthermore, modeling data from the Pardee Institute's International Futures (IFs) integrated modeling framework was used to strengthen the robustness of the foresight scenarios presented in the report.

Hanna, T., Kelley, C., Kruczkiewicz, A., & Moyer, J. (2023, December). The Impact of Climate Change on Human Development in Yemen. UNDP. https://www.undp.org/sites/g/files/zskgke326/files/2023-11/impact_of_climate_change_on_human_development_in_yemen.pdf

This report presents the findings of a study on projections of climate change in Yemen and its effect on human development. The United Nations Development Programme commissioned the Pardee Center for International Futures to complete this study.