There is a quote, which Capitalist Realism author Mark Fisher attributes to Fredric Jameson and Slavoj Žižek that “it is easier to imagine an end to the world than an end to capitalism.” I will say that this is likely not a recent insight among leftist thinkers. Acute crises like the First World War, which involved countries with high numbers of left-wing intellectuals and political parties, very well saw the imperialist carnage of European nation-states in apocalyptic terms. Though these crises can create a revolutionary situations (the February and October Revolutions in Russia came amidst a long period of defeats on the frontlines), they may also make it seem more likely that the world will end than a definitive end to the capitalist era. The subsequent Spanish Flu pandemic, coming at the tail end of the war, killed more people than the war.
Most people, outside of infectious disease experts, who worry about the end of human society as we know it, probably thought until a few months ago that the existential crisis was climate change. And indeed, it still is in the long-ish term. But COVID-19, which is ravaging countries with the most developed healthcare systems in the world, and is beginning to affect the Global South with very limited resources, has taken end-times thinking from about a decade out to week-by-week. Under one projection, even U.S states that have enacted shelter-in-place are looking at aggregate casualties in the hundreds of thousands, if not millions, depending on how strictly these advisories are imposed and the amount of assistance supplied by a generally oblivious federal government.
Climate change and COVID-19 have several important similarities. They both expose a general lack of intra-national and international cooperation in issues that ignore borders. Likely, by the end of this, poor countries will be the most vulnerable and the least likely to gain access to treatments discovered in the next year or two. Both reveal a critical lack of attention paid to infrastructure and creating excess capacity. And both have shown in the U.S the power of special interests to siphon of needed money for bailouts that are in large-scale firms largely crises of their own design (i.e spending most of their profits on stock buybacks rather than keeping cash on hand). I think some countries will learn valuable lessons that they will apply to combating climate change, but also that some countries are so deeply dysfunctional that they have both a lack of short-term and long-term planning when it comes to existential threats.
Lenin once wrote “There are decades where nothing happens; and there are weeks where decades happen.” COVID-19 has compressed decades of climate change damage into a couple of months. The end of feudalism occurred over several centuries, where the ancien regime of France fell in a couple of years. The question is whether the obstacles faced in confronting a pandemic will be used later on, or will we learn nothing from the tragedy.