Recently, I was able to read Joel Wainwright and Geoff Mann's book Climate Leviathan, an intriguing look at how global politics must (and will) change as a response to looming climate change. The two analyze the problem from a leftist perspective, using previous philosophical discourse, political commentary, and the truly global nature of the problem to arrive at a simple conclusion; some form of supranational entity may be the only way to address the creeping climate emergency.
They lay out their reasoning quite well, pointing out how, in the words of Ursula K. Le Guin (quoting others) "it is easier to imagine an end to the world than an end to capitalism" and this is, especially in the political and economic sphere, rather true. From the failures of the world to band together in any meaningful way, to the flub that was the 2015 Paris Climate Agreement, to increasing use of fossil fuels and no existent plan to meaningfully reduce their use. This is contrasted to the poisoned pill that the Obama administration took up in the aftermath of the 2008 financial crisis where banks were bailed out and, rather than hold those responsible to account, next to no one was prosecuted or censured for the outrageous acts that lead to the greatest recession in nearly a century.
With these somewhat depressing facts in mind, the authors both critique capitalism and the current liberal/neoliberal establishment that, as yet, has proven almost completely incapable of meaningfully addressing climate change. With no national solution (no single country can address or alter the global climate trajectory) to the problem, the authors posit a Hobbesian Leviathan which takes on supranational importance to govern the global response to the climate emergency. It would be, largely, the existing capitalist/liberal system we know, with tweaks to allow for supranational action. This is contrasted between the 'Climate Behemoth' which is a reactionary rejection of Leviathan where reactionary elements fight and defeat it, making a muddled, uneasy, and disunified fight at regional scale or simply national against climate change.
In contrast to those, we see Climate Mao, an authoritarian supranational entity which would be swept up by not only a populist clamoring for action to mitigate and adapt to the climate emergency, but also punish those responsible. On a global scale this would be rank authoritarianism of the worst kind, while also a means of cathartic solution to popular unrest as those deemed responsible (even their descendants) meet an unkind fate.
The authors stress though that none of these would be in any sense democratic. Mao is the most notably authoritarian, but Leviathan, despite coming with the trappings of liberal democracy, would still command the power and respect to crush dissent largely beneath its heel, and have the justification of saving the world in order to quash any other objections to its programs.
Only one imagined system, dubbed Climate X, would see this not come to pass. A decentralized and supranational, but not quite coordinated, movement of resistance to control, green energy initiatives, and effective decolonization of the modern neoliberal/capitalist systems and other statist means of control. It is moderately utopian in its vision, but the authors stress, not impossible or unimaginable. They lay out no specific goals, and only some examples, but offer it as a tantalizing image of a world where many old inequalities are torn down, but not one which is perfect.
Interestingly, this is not the first I have encountered the idea that planetary governance may be the only way to mitigate the worst fallout from climate change. In the world of The Expanse for instance, after centuries of climate disaster, the nations of the world prove unable to fight the devastation in isolation and so abdicate their political sovereignty in exchange for help to the UN which works to right the wrongs of a ravaged planet. In the Star Carrier series, we see something similar with the Terran Confederation and other supranational entities having banded together to help mitigate the damage. And in Kim Stanley Robinson's 2312 we see a world just hinting at better multinational collaboration for future cooperation.
While science fiction often is often only an examination of the present through a futuristic lens, it does say something that you can find many works envisioning the horrors of climate change only being capable of being resisted by humanity (more or less) united. As the authors of this work posit, fighting climate change in isolation is most likely going to be impossible, leading to supranational organizations and demands to fight against it, or even correct further damage. While this is, for now, only the speculation of some political wonks and science fiction writers, science fiction has occasionally been predictive rather than merely speculative.
Climate change and the various crisis it will entail is a threat to all of humanity, and despite this many people pretend that they can hide from the effects, whether with walls or money. A change in the planet though, is a change for everyone, and as changing weather patters, wildfires, and extreme weather events have shown, even the wealthy and powerful in the West are not immune. Whether we willingly, or unwillingly band together to fight this crisis remains to be seen, but the speculation on the nature (or necessity) of a potential Climate Leviathan is there, and does deserve some pondering on.