A system for international peace WordNet 3.0 & Open English WordNet

Collective security can be understood as a security arrangement, political, regional, or global, in which each state in the system accepts that the security of one is the concern of all, and therefore commits to a collective response to threats to, and breaches of peace. Wikipedia

International security philosophy that everyone is safer together; that the security of one is the concern of all Wikidata

The concept of maintaining peace among all nations or members of a group by making the security concerns of one member important to all members. Wiktionary

Concept of maintaining peace among all nations or members of a group. Wiktionary (translation)