This is a normative/political question that reasonable people disagree on based on their values, priorities, and interpretation of history—it's not something I can answer with a simple yes or no from search results, since it involves value judgments rather than settled facts. That said, I can lay out the main arguments people make on each side, and you can weigh them yourself.
Arguments that NATO is a force for good:
•Deterrence and peace among members: NATO was founded on collective defense (Article 5), and proponents argue it has prevented major war between its members for over 75 years by making external aggression too costly.
•Stability and democratic anchoring: Membership has been used as an incentive for former Eastern Bloc and Balkan states to pursue democratic and legal reforms, arguably contributing to stability in Central and Eastern Europe after the Cold War.
•Response to aggression: Supporters point to NATO's role in supporting Ukraine after Russia's 2022 invasion as evidence the alliance deters and counters authoritarian expansionism.
•Burden-sharing in crises: NATO has coordinated humanitarian and peacekeeping missions (e.g., in the Balkans in the 1990s) that supporters credit with stopping ethnic violence.
Arguments against, or critical of, NATO's record:
•Provocation argument: Critics, including some realist scholars, argue NATO's post-Cold War expansion eastward antagonized Russia and contributed to tensions leading up to the Ukraine war, though this is heavily contested and rejected by most NATO members and Ukraine itself, who see Russian imperialism as the root cause.
•Interventions with mixed results: NATO's 2011 intervention in Libya is often cited as leading to prolonged instability and civil conflict rather than a clean humanitarian success.
•Legitimacy concerns: The 1999 Kosovo bombing campaign was conducted without UN Security Council authorization, leading some to question NATO's adherence to international law.
•Burden and dependency debates: Some argue NATO allows European members to underinvest in their own defense, creating overreliance on the U.S., or that the alliance's existence itself locks in a militarized security paradigm rather than pursuing diplomatic alternatives.
Bottom line: Whether NATO is "good" depends heavily on which outcomes you weigh most—peace among member states, deterrence value, humanitarian intervention record, or its role in geopolitical tensions with Russia and elsewhere. If you'd like, I can dig deeper into any specific aspect (e.g., NATO's role in Ukraine, its founding purpose, or a particular intervention) with more current sourcing.