Older societies are less dynamic, more resistant to change, and less creative. Most scientists and inventors achieve their breakthroughs in their twenties and t

Older societies are less dynamic, more resistant to change, and less creative. Most scientists and inventors achieve their breakthroughs in their twenties and thirties, so fewer young people means fewer good ideas (and more older and infirm people to be supported by those fewer ideas). Until we design AI systems that can completely take over our scientific labours, the only genuine engine of progress on this planet is the kilogram of grey matter inside our skull. And with fewer and fewer fresh brains to produce and exchange ideas, the engine of human progress could soon be grinding to a halt (although the world still has huge reserves of underutilised brainpower in poor countries today) This was a good read and argument, although next 10-20 years may tell how important grey goo in skull still remains.