7.5 - Alliances and international decision making
Learn how powerful states, alliances and the United Nations shape responses to crises, conflict and climate change, and why collective decisions can succeed or stall.
Powerful states and global action
International action depends on players with the resources to turn a decision into a response.
The USA and China can influence a crisis through finance, diplomatic pressure, transport capacity, medical expertise and military assets. Emerging powers can provide troops, regional knowledge or mediation. A government may act to protect people, but also to protect trade routes, allies, energy supplies or its reputation. These motives can coexist. Calling a state a global police power describes its claimed role in maintaining international order; it does not give it a general legal right to intervene wherever it chooses.
For example, the UN established its Ebola emergency mission, UNMEER, in September 2014 for the West African crisis. Its advance deployment covered Ghana, Guinea, Liberia and Sierra Leone. Coordination could link international expertise and supplies to national health systems. This shows why crisis response needs cooperation with affected governments and communities, as well as money. It is a historical example, not a current mission. UN statement, 19 September 2014.
Military intervention poses a different problem. Force may deter aggression or protect civilians, but can destroy infrastructure, displace people and provoke resistance. The UN Charter prohibits the threat or use of force against states' territorial integrity or political independence; self-defence and Security Council authorisation provide distinct legal routes. Capacity, legitimacy and the effects on people must therefore be examined separately. A powerful country can have the capacity to act while lacking international agreement about its action. UN Charter, Articles 2, 39–51.
Alliances and interdependence
Alliances can increase influence by pooling capabilities and making partners depend on one another.
Geostrategy
The use of geographical position, resources, routes and relationships to pursue political and security objectives.
Military cooperation gives states access to bases, intelligence and compatible equipment. A small ally may gain deterrence from a larger partner; the larger partner gains a strategic location. Economic agreements make cross-border production easier and create a larger market with greater negotiating weight. Interdependence can discourage conflict because disruption becomes costly, but also transmits shocks and constrains national choices.
| Organisation or agreement | How cooperation can create influence | Important distinction |
|---|---|---|
| NATO | Collective defence and coordinated capabilities can deter an attack on an ally. | Article 5 requires assistance, with each ally choosing the action it considers necessary; it does not prescribe an identical automatic military response. |
| ANZUS | The 1951 security treaty links Australia, New Zealand and the USA historically. | US obligations towards New Zealand were suspended in 1987; Australia–New Zealand and Australia–US treaty relationships remain. |
| EU | A single market and collective external trade policy increase bargaining weight. | The EU has shared institutions; it is not simply a military alliance. |
| USMCA | Rules support linked trade and supply chains in the USA, Mexico and Canada. | It replaced NAFTA on 1 July 2020; it is not a common government or a NATO-style defence promise. |
| ASEAN | Regional economic cooperation and dialogue connect Southeast Asian states and external partners. | Its economic, political-security and sociocultural pillars do not make it a NATO-style collective defence alliance. |
| IPCC | Governments share an assessed scientific basis for considering climate risks. | It is a scientific assessment body, not a treaty alliance or an emissions regulator. |
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