I know not with what weapons World War III will be fought, but World War IV will be fought with sticks and stones.

Summary

This quote by Albert Einstein is a reflection on the devastating consequences of future wars. By stating that he is uncertain about the weapons used in World War III, Einstein suggests that the destructive power of those weapons will be unimaginable. The irony lies in his prediction for the following war, World War IV, which he claims would be fought with primitive tools like sticks and stones. This implies that the sheer devastation wrought by the third war would be so catastrophic that it would bring humanity back to an era devoid of technological advancements.

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