According to realists what mechanism comes into play if one country or group of countries seeks world domination?

Question

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Realists believe that if one country or group of countries seeks world domination, other nations will form alliances and create a balance of power to prevent any one state from gaining too much control. This can help deter aggression and prevent conflict. Diplomacy and arms races may play a part, but the primary mechanism is the balance of power. Preemptive war is not favored by realists, as it can lead to instability and unpredictable outcomes.

According to Realists What Mechanism Comes into Play If One