After the world war to end all world wars, WWI, it took only 20 years for another world war to start.

After the USA ended WWII with new weapon, nuclear, there has been about 65 years without another world war.

And we need a new policy, why?

EDIT: It would be 85 years without a World War if we had a nuclear bomb to end World War I.

Can you imagine the "conventional wars" that would have consumed the last 65 years if the "bomb" was not invented and applied.