Name 3 reasons the U. S. felt that perhaps the nation's best days were over:

In current times, three reasons that the U.S. could feel that perhaps the nation's best days are over:

The rise of China: China is growing economically more rapidly than the U.S., and it has a larger population. China could overtake the U.S. in the near future, and become the new world superpower.Increased economic inequality: since the 1980s, economic inequality has grown in the United States. This divide between the rich and the poor has led to more social tensions.Military failures: the last American Interventions in Afghanistan, Libya, Iraq and Syria have not led to the desired results. The countries intervened have become more unstable than before, and in the particular case of Syria, Russian influence has become stronger than before, and Russia is a geopolitical adversary of the U.S.