I remember talks mentioning Newtons speculations said with the caveat that it was too late a prediction and with world conditions being so bad that the inside of the magazines said the end of this system would come during this 20th century and that was only a few years away.
Well the 20th century is come and gone. Newton's predictions included dates like 2034 and 2060. I wouldn't be surprised if they now pushed Newton dates as being a possibility of the end.