The Cold War was another turning point in the evolution of modern diplomacy. Despite the existence of nuclear threat stemmed from proliferation of nuclear weapons and the feeling of insecurity throughout the world, diplomacy became an integral part of Cold War politics especially in the form of summit diplomacy between two superpowers. Therefore, diplomatic institutions and instruments have been professionalized since the beginning of the Cold War with the unprecedented development of globalization. Bilateral and multilateral negotiations and summits have jointly become the platform of inter-state relations. Institutionally, ministries of Foreign Affairs and diplomatic missions are still basic institutions of diplomacy. Non-Governmental Organizations (NGOs) and Multi-National Companies (MNCs) have become essential parts of diplomacy in the global age.