In Book VI, Polybius describes the political, military, and moral institutions that allowed the Romans to succeed. He also describes the First and Second Punic Wars. Polybius concludes that the Romans are the pre-eminent power because they have customs and institutions which promote a deep desire for noble acts, a love of virtue, piety towards parents and elders, and a fear of the gods ("deisidaimonia"). Polybius also details the battles between Hannibal Barca and Scipio Africanus in the Second punic War; such as the Battle of Ticinus, the Battle of the Trebia, the Siege of Saguntum, the Battle of Lilybaeum, the Battle of Rhone Crossing and the Battle of Zama, among others.