The biggest threat to mankind is without a doubt massive, powerful governments. Democide has killed countless people and certainly will continue to do so.

Secondary would be population collapse from low birth rates.

Third would be cataclysm completely outside our control. Celestial impacts, pole shift, etc.

Humans and our systems are more fragile than we realize, but the earth is not.

Stack sats. Hope for the best. Prepare for the worst. ✌🏼