Q: What can we expect?
A: Pretty much what you read about in New Scientist every week. Climate change, dust bowls caused by over-cultivation necessitated by over-population, resource depletion in obscure and irritatingly mission-critical sectors (never mind oil; we’ve only got 60 years of easily exploitable phosphates left — if we run out of phosphates, our agricultural fertilizer base goes away), the great population overshoot (as developing countries transition to the low population growth model of developed countries) leading to happy fun economic side-effects (deflation, house prices crash, stagnation in cutting-edge research sectors due to not enough workers, aging populations), and general bad-tempered overcrowded primate bickering.
Oh, and the unknown unknowns.
Q: Unknown unknowns? Are you talking about Donald Rumsfeld?
A: No, but I’m stealing his term for unprecedented and unpredictable events (sometimes also known as black swans). From the point of view of an observer in 1909, the modern consumer electronics industry (not to mention computing and internetworking) is a black swan, a radical departure from the then-predictable revolutionary enabling technologies (automobiles and aeroplanes). Planes, trains and automobiles were already present, and progressed remarkably well — and a smart mind in 1909 would have predicted this. But antibiotics, communication satellites, and nuclear weapons were another matter. Some of these items were mentioned, in very approximate form, by 1909-era futurists, but for the most part they took the world by surprise.
We’re certainly going to see unknown unknowns in the 21st century. Possible sources of existential surprise include (but are not limited to) biotechnology, nanotechnology, AI, climate change, supply chain/logistics breakthroughs to rival the shipping container, fork lift pallet, bar code, and RFID chip — and politics. But there’ll be other stuff so weird and strange I can’t even guess at it.
Q: Eh? But what’s the big picture?
A: The big picture is that since around 2005, the human species has — for the first time ever — become a predominantly urban species. Prior to that time, the majority of humans lived in rural/agricultural lifestyles. Since then, just over 50% of us now live in cities; the move to urbanization is accelerating. If it continues at the current pace, then some time after 2100 the human population will tend towards the condition of the UK — in which roughly 99% of the population live in cities or suburbia.
This is going to affect everything.
It’s going to affect epidemiology. It’s going to affect wealth production. It’s going to affect agriculture (possibly for the better, if it means a global shift towards concentrated high-intensity food production, possibly in vertical farms, and a re-wilding/return to nature of depopulated and underutilized former rural areas). It’s going to affect the design and layout of our power, transport, and information grids. It’s going to affect our demographics (urban populations tend to grow by immigration, and tend to feature lower birth rates than agricultural communities).
There’s a gigantic difference between the sustainability of a year 2109 with 6.5 billion humans living a first world standard of living in creative cities, and a year 2109 with 3.3 billion humans living in cities and 3.2 billion humans still practicing slash’n’burn subsistence farming all over the map.
Q: Space colonization?
A: Forget it.