The concept of collective security in international relations refers to the principle that states must work together to ensure mutual security and protect against threats. This framework suggests that an attack on one member of a security alliance is considered an attack on all, promoting solidarity among nations. Collective security mechanisms are intended to deter aggression and foster peaceful resolutions to conflicts. Prominent examples include the NATO alliance and the United Nations framework. By emphasizing cooperation, collective security aims to maintain global stability and prevent warfare, highlighting the importance of diplomacy in international relations.