nuclear war
Nukes in Space
If used offensively, nukes in space could immediately send civilization back one hundred years. No warning. No preparation. Nothing.
Russia
Civilization
Prepping for WW3: Governments Will Send You to War
War is approaching. Millions - or even billions - of lives are at stake. And you will be required to fight.
Civilization
Strolling into Nuclear Apocalypse
The unpredictability of human rationality and emotion means the "limited" use of battlefield nukes could easily morph into a full blown nuclear apocalypse.
China
Running Head First to WW3
On a superficial level, this appears to be a tit for tat. Terrorists attacked. IDF hits back. However, there are bigger forces at play. These forces could push the world into a new world war, America into terminal decline and trigger nuclear annihilation.
Collapse
The Approaching Energy Shock
A massive oil shock could be just around the corner. And nobody is talking about it.