When the Soviet Union collapsed the world had its best opportunity since World War I for peace. That chance was not seized by the US government. From David Stockman at antiwar.com:
After the Berlin Wall fell in November 1989 and the death of the Soviet Union was confirmed two years later when Boris Yeltsin courageously stood down the Red Army tanks in front of Moscow’s White House, a dark era in human history came to an end.
The world had descended into a 77-Year War, incepting with the mobilization of the armies of old Europe in August 1914. If you want to count bodies, 150 million were killed by all the depredations that germinated in the Great War, its foolish aftermath at Versailles, and the march of history into World War II and the Cold War that followed inexorably thereupon.
Upwards of 8% of the human race was wiped out during that span. The toll encompassed the madness of trench warfare during 1914-1918; the murderous regimes of Soviet and Nazi totalitarianism that rose from the ashes of the Great War and Versailles; and then the carnage of WWII and all the lesser (unnecessary) wars and invasions of the Cold War including Korea and Vietnam.
At the end of the Cold War, therefore, the last embers of the fiery madness that had incepted with the guns of August 1914 had finally burned out. Peace was at hand. Yet 29 years later there is still no peace because Imperial Washington confounds it.