International security refers to the protection of states and other actors from external threats and the promotion of international stability and cooperation. International security issues encompass a wide range of topics, including conflict prevention and resolution, arms control and disarmament, counter-terrorism, and cyber security, among others.

One major international security issue is the proliferation of weapons of mass destruction (WMDs), including nuclear, chemical, and biological weapons. The international community has sought to address this issue through a range of measures, including arms control agreements, proliferation prevention initiatives, and sanctions against states that violate international non-proliferation norms.

Terrorism is another major international security issue, as non-state actors increasingly use violence and intimidation to achieve political goals. The international community has responded to this threat through a range of measures, including military action, intelligence-sharing, and efforts to counter violent extremism.

Cyber security is also a growing concern, as the increasing reliance on technology has made states and other actors vulnerable to cyber attacks. The international community has sought to address this issue through a range of measures, including cyber defense cooperation and efforts to establish international norms and standards for responsible state behavior in cyberspace.

Overall, international security is a complex and multifaceted issue that requires the cooperation of states and other actors to address the challenges and threats that it poses.