Americans abandoning their country’s traditional values could mark the beginning of the end for one of the world’s greatest empires, a libertarian think tank founder warned.

“If the present trends continue, I think we’ll look back at the last few years as a real turning point in American history,” Brownstone Institute President Jeffrey Tucker told Fox News. “The end of the American empire.”

The importance of long-held values like patriotism, religion and having children are declining across America, according to a recent Wall Street Journal/NORC survey released Monday. Within the last 25 years, the share of Americans who said patriotism is very important dropped from 70% to 38% while the value of religion dipped from 62% to 39%.