Is NATO a force of good in the world?
I'll gather a balanced view of NATO's record — from its stabilizing role to current debates — to answer whether it's a force for good.
NATO - the North Atlantic Treaty Organization - is generally evaluated differently depending on perspective, but its record includes both widely cited achievements and significant controversies.
What NATO Is
NATO was established on April 4, 1949, as a military alliance to ensure collective defense of its members against the Soviet Union's expansion during the Cold War. Originally consisting of 12 founding members, it expanded over time and now comprises 32 member states including most of Western and Central Europe, Canada and the United States.
Its core mission is collective defense against aggression, promoting stability and security through cooperation, enshrined in Article 5 of its founding treaty. This principle dictates that an attack on one member is deemed an attack on all, compelling collective response. Historically its purpose was described as 'to keep the Americans in, the Russians out, and the Germans down' and to deter threats through the promise of response.
NATO describes itself as a defensive Alliance and says none of its activities pose a risk to any part of Russia.
Article 5 has been invoked only once in NATO history, after the September 11 attacks on the United States in 2001, when Secretary General George Robertson said declaring an Article 5 contingency would be a useful political statement. After 9/11 the alliance agreed on specific support measures and later led the International Security Assistance Force (ISAF) in Afghanistan.
Arguments That NATO Is a Force for Good
Supporters point to several roles:
1. Deterrence and prevention of major war in Europe: During the Cold War NATO is credited with deterring Soviet aggression. More recently, proponents argue NATO retains overwhelming economic advantages, superior aggregate military spending, technological advantages, and nuclear deterrence, making an attack on NATO entirely different from invading Ukraine.
2. Crisis management and peacekeeping: NATO has taken on new roles like crisis management and peacekeeping after the Cold War. Then-Secretary General Anders Fogh Rasmussen said "NATO is today the most effective peacekeeper in the world" pointing to operations in Bosnia, in Kosovo, and in the Former Yugoslav Republic of Macedonia where NATO-led forces helped manage crises and build stability.
Notable operations cited as success stories include the Kosovo Force (KFOR) and ISAF in Afghanistan, exemplifying NATO's capacity to address complex security challenges and restore stability. NATO is described as the most capable regional organization in terms of its ability to provide military forces and respond to crises.
Some U.S. political figures have called the alliance "the greatest combined force for good in world history, defending our freedom and democracy around the globe".
3. Political stability and cooperation: NATO provides a link between North America and Europe and encourages consultation and cooperation with non-NATO countries in areas such as defence reform and peacekeeping. Its expansion after 1991 allowed countries in Central and Eastern Europe to join a collective defense system, with Finland becoming the 31st member in 2023 after dropping decades of military non-alignment following Russia's invasion of Ukraine.
In 2025, for the first time since the 2% of GDP benchmark was set in 2014, all 32 members met or exceeded the target, which supporters cite as evidence of burden-sharing.
US polling on NATO has historically shown bipartisan support.
Arguments and Criticisms
Critics raise several concerns:
1. Legality and consequences of out-of-area interventions: Critics point to interventions and NATO wars that violate international law including in Yugoslavia, Afghanistan, and Libya and accuse the alliance of contributing to escalation instead of ensuring security. Some critics describe NATO as "not about 'peace' or 'security'... It's an imperialist war machine" citing Afghanistan and Libya.
The 1999 intervention in Kosovo was widely described as "illegal but legitimate" by some scholars because it occurred without UN Security Council authorization.
The 2011 intervention in Libya has been described as disastrous, triggering generalized destabilization of the whole North African region, and as a case where NATO moved from defensive to offensive under pretexts of humanitarianism.
In Afghanistan, critics note that "with eight years of hard work, massive US leadership, and more than 150,000 troops on the ground, NATO has made little lasting impact and is beginning a retreat without a clear victory".
2. Expansion and relations with Russia: Critics argue that NATO expansion into Eastern Europe has contributed to rising tensions between the West and Russia. Others warn that creeping expansion and military hardware is threatening peace and attempting to surround Russia and China.
3. Limitations as a peacekeeping actor: Even analysts sympathetic to NATO note limitations: NATO has no capacity for civil implementation and must always depend upon the United Nations and/or ad hoc coalitions to perform non-military functions essential to nation-building. As the world's strongest military alliance, it is "just that, a military alliance" and unlike the UN or EU is not equipped to undertake police training, voter registration or economic development.
Assessment
Whether NATO is a "force for good" is therefore a normative judgment:
Most independent assessments acknowledge both: NATO has succeeded in its core collective-defense function for members and in short-term military stabilization, but has faced challenges in long-term nation-building, civilian reconstruction, and in managing the geopolitical consequences of enlargement and out-of-area operations.