Morgenthau (1948) states that three prerequisites must be met for collective security to successfully prevent war: The collective security system must be able to assemble military force in strength greatly in excess to that assembled by the aggressor(s) thereby deterring the aggressor(s) from attempting to change the world order defended by the collective security system.
Morgenthau (1948) menyatakan bahwa ada tiga syarat yang harus dipenuhi agar keamanan kolektif berhasil mencegah perang: Sistem keamanan kolektif harus mampu mengerahkan pasukan militer yang lebih besar daripada pasukan militer musuh sehingga musuh enggan berusaha mengubah tatanan dunia yang dipertahankan sistem keamanan kolektif.