Political Forum Europe

That economic stratification may lead to collapse on its own, on the other hand, came as more of a surprise to Motesharrei and his colleagues. Under this scenario, elites push society toward instability and eventual collapse by hoarding huge quantities of wealth and resources, and leaving little or none for commoners who vastly outnumber them yet support them with labour. Eventually, the working population crashes because the portion of wealth allocated to them is not enough, followed by collapse of the elites due to the absence of labour. The inequalities we see today both within and between countries already point to such disparities. For example, the top 10% of global income earners are responsible for almost as much total greenhouse gas emissions as the bottom 90% combined. Similarly, about half the world’s population lives on less than $3 per day. 

For both scenarios, the models define a carrying capacity – a total population level that a given environment’s resources can sustain over the long term. If the carrying capacity is overshot by too much, collapse becomes inevitable. That fate is avoidable, however. “If we make rational choices to reduce factors such as inequality, explosive population growth, the rate at which we deplete natural resources and the rate of pollution – all perfectly doable things – then we can avoid collapse and stabilise onto a sustainable trajectory,” Motesharrei said. “But we cannot wait forever to make those decisions.”

On the other hand, Western societies may not meet with a violent, dramatic end. In some cases, civilisations simply fade out of existence – becoming the stuff of history not with a bang but a whimper. The British Empire has been on this path since 1918, Randers says, and other Western nations might go this route as well. As time passes, they will become increasingly inconsequential and, in response to the problems driving their slow fade-out, will also starkly depart from the values they hold dear today. “Western nations are not going to collapse, but the smooth operation and friendly nature of Western society will disappear, because inequity is going to explode,” Randers argues. “Democratic, liberal society will fail, while stronger governments like China will be the winners.”
Some of these forecasts and early warning signs should sound familiar, precisely because they are already underway. While Homer-Dixon is not surprised at the world’s recent turn of events – he predicted some of them in his 2006 book – he didn’t expect these developments to occur before the mid-2020s.
Western civilisation is not a lost cause, however. Using reason and science to guide decisions, paired with extraordinary leadership and exceptional goodwill, human society can progress to higher and higher levels of well-being and development, Homer-Dixon says. Even as we weather the coming stresses of climate change, population growth and dropping energy returns,...