a divine judgment in favor of Charles and gave him the nickname Martellus ("The Hammer"). Later Christian chroniclers and pre-20th century historians praised Charles Martel as the champion of Christianity, characterizing the battle as the decisive turning point in the struggle against Islam, a struggle which preserved Christianity as the religion of Europe. According to modern military historian, Victor Davis Hanson "most of the 18th and 19th century historians like Gibbon saw Tours as a landmark battle that marked the high tide of the Muslim advance into Europe." Leopold von Ranke felt that Tours-Poitiers "was the turning point of one of the most important epochs in the history of the world." William E. Watson writes that "the subsequent history of the West would have proceeded along vastly different currents had 'Abd ar-Rahman been victorious at Tours-Poitiers in 732" and that "[a]fter examining the motives for the Muslim drive north of the Pyrenees, one can attach a macrohistorical significance to the encounter ... especially when one considers the attention paid to the Franks in Arabic literature and the successful expansion of Muslims elsewhere in the medieval period." Victorian writer John Henry Haaren says in Famous Men of the Middle Ages "The battle of Tours or Poitiers as it should be called is regarded as one of the decisive battles of the world. It decided that Christians and not Muslims should be the ruling power in Europe." Bernard Grun delivers this assessment in his "Timetables of History", reissued in 2004: "In 732 Charles Martel's victory over the Arabs at the Battle of Tours stems the tide of their westward advance." Historian and humanist Michael Grant lists the battle of Tours in the macrohistorical dates of the Roman era. Historian Norman Cantor who specialized in the medieval period, teaching and writing at Columbia and New York University said in 1993: "It may be true that the Arabs had now fully extended their resources and they would not have conquered France, but their defeat (at Tours) in 732 put a stop to their advance to the North."<ref>Civilization of the Middle Ages p. 136.</ref> Military historian Robert W. Martin considers Tours "one of the most decisive battles in all of history." Additionally, historian Hugh Kennedy says "it was clearly significant in establishing the power of Charles Martel and the Carolingians in France, but it also had profound consequences in Muslim Spain. It signaled the end