For Nukes thats just a given nowadays, humans have a remarkable ability to adapt to constant threats. Not in the sense of being able to do something against it but to know it exists and not be terrified every single day. So many things can threaten human life that exist around us and yet we do not get scared after some time anymore atleast not constantly. Look at people living in Australia the entire ecosystem is basically a giant threat to anyone living there. Look at people living in earth prone regions of the world. People adapt and keep on living their lives. This is a fundamental human skill.
True! This is precisely what really annoys me about humans, because it makes humans not care about many things, and it's a skill I struggle with, which causes constant anger and helplessness on my side of things. But I guess it's what allows people to have hope and being whimsical, happy and whatnot.
No, of course not. It's a threat to people within 15 miles of the explosion plus people who are outdoors and turn to look at the bright light in the sky.
And there's never been enough nukes to kill all human life. That statement is based on a despicable calculation in which it is assumed that people would assemble packed shoulder-to-shoulder in circles of just the right size and there are no structures or land masses to deflect the blast and no clouds or fog to absorb the intense light.