So, in response to my own earlier question: Disasters to prompt the bettering of civilisation, I have decided to go with an asteroid impact which decimates much of civilization, with an added twist that the chaotic events the asteroid causes are reminiscent of the cataclysms said to take place at Ragnarok in Norse mythology.
More specifically, the asteroid hits the North Pole, with the resulting masses of ice and dust released into the atmosphere blocking out the sun, hence the “three year winter”. War between major countries breaks out over now-scarce food and resources, with the largest nations, (like America) collapsing. Eventually, the masses of ice released into the air melt, deluging the planet with massive rainfall. Large areas of land are flooded, and all sense of order breaks down.
A few decades later, the climate stabilizes itself, and the survivors emerge: the few thousand people who retreated into large bunkers to wait out the crisis, and whose descendants come to repopulate the world. Learning from the mistakes of their ancestors, the survivors rebuild civilization as environmentally friendly as possible, and use gene banks to recreate the planet’s wilderness. Eventually, fear at a future catastrophe drives the new major governments to send missions into space to colonies Mars, Venus and eventually extra-solar planets.
Would this, as the basis for a project, work? That is, are there any major physical or sociological flaws in this plan?