Example 1: The Cold War threatened world peace. It led to the confrontation between the United States and the Soviet Union. The United States put forward Truman Doctrine and Marshall Plan to form NATO, and the Soviet Union confronted the Warsaw Pact with the Economic Mutual Assistance Committee, which led to the Berlin crisis and other confrontation events. Putting the world under the threat of nuclear war has caused a huge shadow on human psychology and culture, resulting in an indelible "cold war mentality." In order to compete for spheres of influence and world hegemony, the two sides trampled on international law and interfered in other countries' internal affairs, which seriously undermined world peace. In Asia, there have been "hot wars", such as the Korean War, the Vietnam War and the Afghanistan War, which have brought great losses to human life and property.

Example 2: The Cold War ensured the relative peace and security of the world. The two groups are evenly matched and dare not use force easily, thus avoiding the outbreak of a new world war. Forces outside the United States and the Soviet Union are striving for development for their own security. The establishment of Europe, the rise of Japan as a world economic power, the rise of the Non-Aligned Movement and the revival of China have all contributed to the emergence of a multipolar world pattern. Capitalist countries have made great efforts to adjust and develop their economies with the help of relatively stable situation, while the Soviet Union has carried out economic system reform. The "Cold War" promoted the rapid development of science and technology to some extent.

Example 3: Synthesis of Example 1 and 2. (close to the object of comment, with clear views; Historical facts are clear, logical and coherent)