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. 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 , 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 would have predicted this.