Indivisible security

Indivisible security is a principle stating that the security of one nation is inherently linked to the security of others, emphasizing that no state can enhance its security at the expense of another.

This concept was first articulated during the Cold War and was included in the Helsinki Accords of 1975, which emphasized that the security of one country cannot be separated from the security of others in the region. It asserts that all states have an equal right to security and that actions taken by one state should not undermine the security of others.

Russia has invoked this foreign policy principle to criticize NATO expansion, claiming that such actions threaten its security interests.