First rule in the Hitchhiker's Guide to the Galaxy.
Everybody else is. But you shouldn't. Because you've got to keep the revenues rolling in to provide the money to complete the government shelters. You should keep shopping until further notified.
1. This is cyclic and regular. That's why the planet is not overrun (completely) by idiots.
2. Humans have survived it before.
3. Nobody who survived it before was anything like left wing. Left wing is a type of person that lives during the interglacial but not outside it. Left wing is synonymous with anti-life. They always do the opposite of what makes sense.