We won the Cold War because we realized—most of the time and to the greater extent—that winning it was about changing ourselves so that we became better: it was about us rather than about them. The current crop who wish to wage a Cold War against China do not recognize this:

George Kennan (1947): Sources of Soviet Conduct: "The possibilities for American policy are by no means limited to holding the line and hoping for the best.... It is rather a question of the degree to which the United States can create among the peoples of the world generally the impression of a country which knows what it wants, which is coping successfully with the problem of its internal life and with the responsibilities of a World Power, and which has a spiritual vitality capable of holding its own.... The issue of Soviet-American relations is in essence a test of the overall worth of the United States as a nation among nations. To avoid destruction the United States need only measure up to its own best traditions and prove itself worthy of preservation as a great nation.... The thoughtful observer of Russian-American relations will find no cause for complaint in the Kremlin's challenge to American society. He will rather experience a certain gratitude to a Providence which, by providing the American people with this implacable challenge, has made their entire security as a nation dependent on their pulling themselves together and accepting the responsibilities of moral and political leadership that history plainly intended them to bear...