From Clem Sunters 2015 look at trends for the 21st C.: 
"We are entering a post-American World The latest revelations about America's spying activities - even tapping the mobile phones of heads of state who are supposed to be allies - shows a signi!cant level of desperation and loss of leadership in the world's most powerful nation. Not only has its relationship with the other G8 nations deteriorated, its in$uence among them has diminished. With the ascent of China and other emerging economies, America's share of global GDP is declining. With its burgeoning national debt, its indebtness to the rest of the world is growing. We are entering a leaderless world with increasing potential for confict and unpleasant surprises." It has been going on since the USSR fell apart. Trump typical of a driving take no prisoners New York wheeler dealer shoves it up front to everyone. Get huffy about how he does it but for crying in a bucket face US policy realities without the old Dem vs Rep nonsense.