1. A government that keeps its citizens through hazy reports of violence by “outsiders”
2. The rise of China and decline of the US
3. Fanatical, Conspiracy Theorist Right-wingers
4. Spiders
5. Global Warming
6. An unnoticed asteroid hitting the planet and destroying civilization
7. The possibility of a major solar flare destroying the national power-grid, which could take months to years to repair, thereby destroying civilization
8. Bears
9. Nuclear terrorists
10. Not saving enough for retirement