The dissolution of the union of the soviet socialist republics (ussr)
reduced the number of communist nations in the world
ended conflict in eastern europe
did not affect the united states
changed boundaries in europe
affected nations across the globe

The dissolution of the Union of the Soviet Socialist Republics (USSR) "reduced the number of Communist nations in the world" and "changed boundaries in Europe," since the USSR had overseen a number of "satellite states". 

In my honest opinion , i’d say franklin d roosevelt was a president that impacted our nation , i say this because fdr is voted among top three best us presidents and he was the longest serving president by 3 terms , usually presidents only supposed to have two terms increments of 4 years , equivalent to 8 years total before election time. and he established the fdic , through the 1933 banking act and he established the us , social security system , during his presidency, and established a national minimum wage , through the fair labor standards act , fdr led the allied coalition to victory in wwii and he played a major role in the creation of the united nations.