The Care Horizon

Erik Solheim, Head of UN Environment, participates in the largest beach clean-up in history at Versova Beach Clean-Up in Mumbai, India. (C) RedBox Filmers
There is a concept in sociology called Dunbar’s number. It refers to the size of a social group that a single person can comfortably maintain. The number usually given is 150. That means that at around 150 social relationships, we hit a psychological ceiling and have trouble keeping up with more. Robin Dunbar, the British anthropologist who researched the idea, suggests it reflects a natural limit in our primitive brain, after which we don’t have much more mental energy to expend on others.
To me, Dunbar’s number is an expression of a greater human limitation. We tend to have a natural upper limit on what we can care about both in proximity and time: a care horizon. Most will prioritize their immediate family over their neighbours and their neighbours over people in the next town. The exception being if you have terrible neighbours.
Similarly, most people concern themselves events happening in the near future. The latest event someone might plan for is their retirement, or even funeral. But something 100 years from now? That’s rare.
Here and now
This makes sense. We only have so much mental bandwidth, so we typically concern ourselves with the here and now.
For thousands of years, this built-in local limit did not impact our planet as a whole. That’s because two thousand years ago - even two hundred years ago - what a single person did in the Americas, for example, had virtually zero impact on someone who lived in Asia.
Today, though, it is causing major issues. As everyone knows, our planet is now incredibly interconnected and inter-reliant. Not only virtually. Clothes worn by Americans, Chinese, Brazilians, and many others will come from Bangladesh or Lesotho. Plastic waste disposed improperly in El Salvador makes its way to giant gyres of plastic in the Pacific Ocean, where it enters the food chain, and ends up consumed by humans in high-end sushi restaurants all along the Pacific Rim.
Yet our care horizon remains firmly in place. It is difficult enough to conceive of how connected everything is, before we even get around to conceiving solutions.
How to expand the care horizon?
The question I’m often asked is: What has to be done in the coming decades to handle environmental issues like climate and resource use, and the need for economic development?
My answer to this question is contained in the answer to another question: How do we extend our care horizon? When people care about getting something done, we are virtually unfettered in what we can achieve. And the problems of environment and development are relatively easy challenges.
