The 1960's also saw another wave of social reforms with the strength of the civil rights movement, especially during the administrations of Presidents Kennedy and Johnson.The new social reforms enforced the constitutional right in voting and other creedoms among African Americans and other minorities.The United States became the World's only super power in 1991 when the Cold War ended due to the 21 st century international relations centered mainly around the Middle East with a direction heading towArds Asia and Africa following the attacks by AL-Qaeda on September 11th 2001.In 2008 the Great Depression.