So, supposing there was an asteroid impact sometime next week, who (if any) would you expect to survive? Because, my guess would be that the best chance would be handed to those least capable of fending for themselves - a very different type of genetic bottleneck to the one our species is thought to have previously survived...And, do you really believe that the spectre of politics wouldn't cloud people's ideas, on how to proceed, following such a global catastrophe? Because I, for one, have no doubt at all that it would: IMO, we'd be in a real-life Mad Max movie!