What is China doing to Africa? And how is that any different than what US does to any other region in the world. Even though America is a democracy it has not really promoted democracy overseas. Apart from earlier itself being involved in wars now instead many bad foreign leaders are supported by US politicians and leaders. Allies which have been behaving badly for long time.
US greatest talent is (perhaps was) it’s ability to attract the talent of the world and creating great value out of it. This happened primarily during and after the world wars was as many nations were becoming more hostile places and American open culture and values became a refuge for many. US will only truly lose it’s leadership position when it gives up on moral leadership.