I forgot the sociologist's name, but he was from the University of Chicago. And the decline may last for only a few years. It may last for decades. It may go on slowly for centuries. But it does decline.
Every civilization declines and dies, like western civilization is declining and dying today.
There was recently a man from Texas who gave twenty million dollars to Yale University. He wanted them to establish a department where they would teach the values of western civilization. But Yale refused the offer. It was the largest gift ever made to an American University that was refused. Because in their opinion, western civilization has no values worth teaching.