For years, the most extreme climate scenarios shaped headlines, policy debates, and public fear—despite growing evidence that many of those projections were increasingly detached from real-world energy and emissions trends. Now, in a major shift ahead of the IPCC’s Seventh Assessment Report, climate modelers are quietly abandoning some of their most dramatic assumptions.

In this episode of Sanity Check, David R. Legates breaks down the rise and fall of RCP8.5 and SSP5-8.5, the “worst-case” climate pathways that came to dominate public discourse, and explains why CMIP7 is moving in a different direction. From coal projections and emissions trends to media narratives and scientific self-correction, this episode explores what these changes mean for climate science, public policy, and the future of the climate debate.

https://gmd.copernicus.org/articles/19/2627/2026/

https://rogerpielkejr.substack.com/p/rcp85-is-officially-dead

https://www.theclimatebrink.com/p/emissions-are-no-longer-following

https://www.bbc.com/news/science-environment-51281986

https://www.carbonbrief.org/explainer-the-high-emissions-rcp8-5-global-warming-scenario/

https://www.sciencedirect.com/science/article/abs/pii/S0360544217314597

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Our work is entirely supported by donations from people like you. If you benefit from our work and would like to partner with us, please visit www.cornwallalliance.org/donate.

This episode is a bit different from our usual content. We are bringing you a lecture from our inaugural conference, "Heaven and Earth, the Struggle for Faith and Science in the Public Square." If you missed our conference, you're in luck, because we're bringing you a key lecture from our very own Vijay Jayaraj. He dismantles the "green" movement and demonstrates, with compelling evidence, how these protocols damage the developing world.

Visit our podcast resource page: https://cornwallalliance.org/listen%20to%20our%20podcast%20created%20to%20reign/

Our work is entirely supported by donations from people like you. If you benefit from our work and would like to partner with us, please visit www.cornwallalliance.org/donate.

In this episode, E. Calvin Beisner takes on three enduring claims about capitalism and the environment: that it depletes resources, imposes unjust costs, and prioritizes the short term at the expense of the future. Drawing on economic theory, historical evidence, and real-world data, he challenges the assumption that growth inevitably leads to scarcity and argues instead that human ingenuity, price signals, and market coordination expand—not exhaust—what we consider “resources.”

The discussion also tackles the concept of externalities, questioning whether environmental harm is truly a market failure or more often a failure of governance and property rights enforcement. Finally, the episode explores how markets account for the future, pushing back on the idea that capitalism is inherently shortsighted.

At a moment when critiques of markets dominate environmental discourse, this episode offers a clear, systematic defense of capitalism as a framework not only compatible with environmental stewardship, but uniquely suited to sustain it.

Visit our podcast resource page: https://cornwallalliance.org/listen%20to%20our%20podcast%20created%20to%20reign/

Our work is entirely supported by donations from people like you. If you benefit from our work and would like to partner with us, please visit www.cornwallalliance.org/donate.