Arms Race: A competition between nations to acquire superior military capabilities, leading to increased tension as each country tries to outdo the other.
Nationalism: An extreme form of patriotism that places the interests of one's own nation above those of others, often contributing to tensions between countries with different national identities.
Imperialism: The policy of extending a country's power and influence through colonization or economic dominance, which can lead to conflicts and rivalries among nations seeking control over resources or territories.