I’ve heard it said that governments based on a republic have an average life span of about 200 years throughout history. That means America is in overtime.
Other nations have been unable to unseat the USA as the de-facto world leader by force, so they are using the 5th column instead. Here is the definition of the 5th column -> Link to 5th column.
I have chosen to not be political, rather than observe patterns and history on this one.