Collective security is a system in which a group of nations agrees to respond together to threats against any member. This approach aims to deter aggression by ensuring that an attack on one member is considered an attack on all, promoting peace and stability. Organizations like the United Nations often operate under this principle to maintain international order. The concept relies on cooperation and mutual defense, encouraging countries to work together rather than acting unilaterally. By pooling resources and support, collective security seeks to prevent conflicts and resolve disputes through diplomatic means, fostering a sense of shared responsibility among nations.