I think this line explains it all "...the United States ranked 16th in the 2014 Social Progress Index developed by Michael Porter at the Harvard Business School. "
Note the term Social Progress used in conjunction with Harvard Business School. Is it any wonder that the rating of the US is falling?

"only one without universal health insurance coverage "
"I’d like to pin this one on Donald Trump. But U.S. decline has been ongoing for some time."

Biased statist rubbish. Just another anti-Trump screed.
Not compelling at all. Not even worth a -1 much less a +1

Again, more left wing stuff, but with more conformance to reality. The interesting facts lack a salient explanation. But it is compelling enough to discuss, so +1.