Romans saw omens but over-extended
Mayans lost water on which they depended
Qin caved-in under floods & droughts
Egyptians inflicted by military routs
Phoenicians ceased in trade war traumas
Greeks peaked at fractious borders
Ottomans bottomed, politically arthritic
Sumerians despaired when their soil turned acidic
(So our imminent collapse should hold no surprises
Preceded by so many famous demises)