It will most likely not do all this. It s sad and bad, it's happening and our fault, but there has been costal cities in trouble before, people already mass migrate in time of despair without the need for the climate, and wars happen for far less.

You can roll up agonizing in fear, or you can prepare yourself for a bit of struggle. We can help lower the impact, but there's no reason to panic.

Most likely the impact on humanity will be minimal, if not the impact on life itself will be medium, and the Earth will spin a few more cycles with or without us.

This doesn't really matter, and we should just take it calmly, and talk to each other. No need for end of the world nuclear war hysteria.