Today, humanity holds over twelve thousandnuclear weapons. And yet, science tells us something unsettling…

We don’t need all of them.

A fraction of that arsenal—just afraction—could collapse global agriculture, darken the skies, and trigger achain reaction that brings modern civilization to its knees.

The question is:

Why do we have so many?

What if, during the height of the Cold War,leaders like John F. Kennedy realizedsomething profound—and made a different choice?