Epochal turns: Uncomfortable insights, uncertain outlooks

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Abstract

The perfect storm of converging political, security, environmental and social crises enforces an epochal turn. Necessarily increasing defensive expenditures for health and climate damage compensation combine with climate adaptation and increased security spending to drive already sluggish economic growth rates into negative territory. The result will by accelerating degrowth, an end to just‐in‐time production concepts, higher resource cost, new dependencies on metal exporters (some of them as nasty as Putin's Russia), and decreasing median incomes. Without significant U‐turns on tax and distribution policies, funds will be lacking to address the challenges. Rather than promising easy ways out of the crises, stopping the drivers, focussing on well‐being instead of growth, and exploring ways to a dignified life within the crises need to be political priorities.

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Trajectories of the Earth System in the Anthropocene

Will Steffen, Johan Rockström, Katherine Richardson … (2018)

We explore the risk that self-reinforcing feedbacks could push the Earth System toward a planetary threshold that, if crossed, could prevent stabilization of the climate at intermediate temperature rises and cause continued warming on a “Hothouse Earth” pathway even as human emissions are reduced. Crossing the threshold would lead to a much higher global average temperature than any interglacial in the past 1.2 million years and to sea levels significantly higher than at any time in the Holocene. We examine the evidence that such a threshold might exist and where it might be. If the threshold is crossed, the resulting trajectory would likely cause serious disruptions to ecosystems, society, and economies. Collective human action is required to steer the Earth System away from a potential threshold and stabilize it in a habitable interglacial-like state. Such action entails stewardship of the entire Earth System—biosphere, climate, and societies—and could include decarbonization of the global economy, enhancement of biosphere carbon sinks, behavioral changes, technological innovations, new governance arrangements, and transformed social values.