In the late 1940s, Albert Einstein recognized the emerging challenges in controlling nuclear weapons, leading him to express concerns about future conflicts. When questioned about the nature of a potential Third World War, he admitted uncertainty but suggested that the Fourth World War would revert to primitive tools, such as rocks.

This statement reflects Einstein's belief in the destructive potential of nuclear weaponry and underscores his views on the devastating consequences of future wars. It highlights his profound understanding of humanity's cyclical nature during conflicts and the regression that might occur if catastrophic wars were to unfold.