Some countries go to war to survive. Others survive because there is war. Imagine a nation whose existence, global dominance and economy have become deeply connected to conflict. A country that has spent generations building military bases, weapons industries, defence alliances and global influence around its ability to fight, fund and shape wars. For such a country, war is no longer simply something that happens. War is the system. Its dominance depends on military power. Its influence depends on being needed for protection. Its industries depend on weapons contracts. Its global position is strengthened whenever nations feel threatened and turn to it for security, weapons, intelligence and military support. Peace, therefore, creates a strange problem. If the world suddenly became peaceful, what would happen to the enormous industries built around preparing for war? What would happen to the companies producing missiles, fighter jets, drones, bombs and military technology? What...