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    Societal Collapse


    A Living Literature Review
    • The success and failure of the Montreal Protocol

      And why its lessons aren’t easily transferable

      Posted on 2026/06/05

      The Montreal Protocol is the poster child of environmental agreements. It is seen as a stunning success, as it reduced the substances in the atmosphere it was meant to manage by almost 100 %. Without it the ozone layer would be massively depleted by now and we would have seen... [Read More]
      Tags:
      • Influence Factors
      • Climate Change
    • AMOC collapse

      How worried should we be?

      Posted on 2026/04/17

      What would happen if the Atlantic Meridional Overturning Circulation (AMOC) collapses? A frozen Europe or just somewhat cooler seasons? It seems like the scientific opinion differs wildly in their assessments and public concern seems to be on a strong upward trajectory. Iceland even flagged AMOC collapse as a potential national... [Read More]
      Tags:
      • Influence Factors
      • Climate Change
    • How environmental politics lost the future

      Why we only talk about looming catastrophe

      Posted on 2026/04/07

      You are likely familiar with visions of doom. It is hard to avoid them these days. It’s scary, for sure. But are they helping? Looking at the world, they do not seem very effective. The USA left pretty much every environmental agreement you can think of, the EU always seems... [Read More]
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      • Overview Post
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    • Nuclear war, nuclear winter, and the food system

      A contribution to the United Nations Scientific Panel on the Effects of Nuclear War

      Posted on 2026/02/11

      This post was originally an invited contribution to the United Nations Independent Scientific Panel on the Effects of Nuclear War. I’m also sharing it here as an overview of the current state of nuclear winter research (+ related topics) and the open questions the field is grappling with. It was... [Read More]
      Tags:
      • Overview Post
      • Summaries
    • Strong democracies are a necessity for crisis management

      Why crisis governance depends on democratic capacity

      Posted on 2026/02/02

      The proportion of the global population living under the spectrum of political systems classed as a democracy is near its all-time high, and stands (very approximately) around 4 billion, or around half of the global population. From a historical perspective, democracies have had quite the run over the last two... [Read More]
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    Florian Ulrich Jehn  •  2026

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