In wake of fall of Berlin Wall , United States ' power was at a major loss . This core fact has been demonstrated repeatedly throughout the last two-and-a-half decades , from Somalia in 1993 , Iraq and Afghanistan since 9/11 , and also most recently to Ukraine and Syria . 25 years on , is still most powerful country in the world , but status has diminished . Post - Cold War vision of liberal , capitalist , democratic world living in peace dashed .
In wake of fall of Berlin Wall , United States ' power was at a major loss . 25 years on , is still most powerful country in the world , but status has diminished . Post - Cold War vision of liberal , capitalist , democratic world living in peace dashed .