You have an error in your SQL syntax; check the manual that corresponds to your MariaDB server version for the right syntax to use near 'ORDER BY issue DESC, `year` DESC ) QQ WHERE `year`<2100 ORDER BY modified DES...' at line 1 Bibliographies | Miko Flohr
 

Morris, I. and W. Scheidel (2009). The Dynamics of Ancient Empires. State Power from Assyria to Byzantium. Oxford Studies in Early Empires. Oxford: Oxford University Press .