During Cuba crisis, US deployed Nukes in Turkey to deter Soviet Union and It succeeded. It means threat worked well for the peace. So, balance of power was seen as a good way for deterrence during cold war. But we are in 21.st century and there must be other ways for achieving the peace. Military or nuclear threat is not an acceptable way to reach the peace. Coz today, international relations are not only based on states. There are many other important actors like NGOs, civil organisations, international organisations etc. We have to strenghten and support them to solve the problems. 21.st century must have a difference from the previous one: "Good will and cooperation instead of balance of power".
Remand of Meir Ettinger, Israel's most wanted Jewish terror suspect, extended (Haaretz)
from the article: Terror without balance