Our present century may not be quite as perilous for the human race as an ice age in the aftermath of a super-volcano eruption, but the next few decades will pose enormous hurdles that go beyond the climate crisis. The end of the fossil-fuel era, the fragility of the global food web, growing population density, and the spread of pandemics, as well as the emergence of radically transformative bio- and nano­technologies—each of these threatens us with broad disruption or even devastation. And as good as our brains have become at planning ahead, we’re still biased toward looking for near-term, simple threats. Subtle, long-term risks, particularly those involving complex, global processes, remain devilishly hard for us to manage.

But here’s an optimistic scenario for you: if the next several decades are as bad as some of us fear they could be, we can respond, and survive, the way our species has done time and again: by getting smarter. But this time, we don’t have to rely solely on natural evolutionary processes to boost our intelligence. We can do it ourselves.

Most people don’t realize that this process is already under way. In fact, it’s happening all around us, across the full spectrum of how we understand intelligence. It’s visible in the hive mind of the Internet, in the powerful tools for simulation and visualization that are jump-starting new scientific disciplines, and in the development of drugs that some people (myself included) have discovered let them study harder, focus better, and stay awake longer with full clarity. So far, these augmentations have largely been outside of our bodies, but they’re very much part of who we are today: they’re physically separate from us, but we and they are becoming cognitively inseparable. And advances over the next few decades, driven by breakthroughs in genetic engineering and artificial intelligence, will make today’s technologies seem primitive. The nascent jargon of the field describes this as “ intelligence augmentation.” I prefer to think of it as “You+.”

Scientists refer to the 12,000 years or so since the last ice age as the Holocene epoch. It encompasses the rise of human civilization and our co-evolution with tools and technologies that allow us to grapple with our physical environment. But if intelligence augmentation has the kind of impact I expect, we may soon have to start thinking of ourselves as living in an entirely new era. The focus of our technological evolution would be less on how we manage and adapt to our physical world, and more on how we manage and adapt to the immense amount of knowledge we’ve created. We can call it the Nöocene epoch, from Pierre Teilhard de Chardin’s concept of the Nöosphere, a collective consciousness created by the deepening interaction of human minds. As that epoch draws closer, the world is becoming a very different place.