We face an epochal, unthinkable prospect: of perhaps the two greatest existential threats – environmental breakdown and food system failure – converging, as one triggers the other.

There are plenty of signs […] suggesting that the global food system may not be far from its tipping point, for structural reasons similar to those that tanked the financial sector in 2008. As a system approaches a critical threshold, it’s impossible to say which external shock could push it over. Once a system has become fragile, and its resilience is not restored, it’s not a matter of if and how, but when.

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It could scarcely be more screwed up. The effort to protect Earth systems and the human systems that depend on them is led by people working at the margins with tiny resources, while the richest and most powerful use every means at their disposal to stop them. Can you imagine, in decades to come, trying to explain this to your children?

Looking back on previous human calamities, all of which will be dwarfed by this, you find yourself repeatedly asking “why didn’t they … ?” The answer is power: the power of a few to countermand the interests of humanity. The struggle to avert systemic failure is the struggle between democracy and plutocracy. It always has been, but the stakes are now higher than ever.