I'm pretty sure that if we faced an alien invasion in 400 years we'd spend the first ~350 of those doing absolutely nothing about it. After all, everyone we kno

I'm pretty sure that if we faced an alien invasion in 400 years we'd spend the first ~350 of those doing absolutely nothing about it. After all, everyone we know will be dead long before that happens, so what's the point? Most people would probably just ignore it.