"Al-Masudi was succeeded by al-Bakri who did something similar for routes and provinces, to the exclusion of everything else, because, in his time, not many transformations or great changes had occurred among the nations and races. However, at the present time -- that is, at the end of the eighth century [A.H.; this is fourteenth century C.E.] -- the situation in the Maghrib, as we can observe, has taken a turn and changed entirely. The Berbers, the original population of the Maghrib, have been replaced by an influx of Arabs, (that began in) the fifth [eleventh] century. The Arabs outnumbered and overpowered the Berbers, stripped them of most of their lands, and (also) obtained a share of those that remained in their possession. This was the situation until, in the middle of the eighth [fourteenth] century, civilization both in the East and the West was visited by a destructive plague which devastated nations and caused populations to vanish. It swallowed up many of the good things of civilization and wiped them out. It overtook the dynasties at the time of their senility, when they had reached the limit of their duration. It lessened their power and curtailed their influence. It weakened their authority. Their situation approached the point of annihilation and dissolution. Civilization decreased with the decrease of mankind. Cities and buildings were laid waste, roads and way signs were obliterated, settlements and mansions became empty, dynasties and tribes grew weak. The entire inhabited world changed. The East, it seems, was similarly visited, though in accordance with and in proportion to (the East's more affluent) civilization. It was as if the voice of existence in the world had called out for oblivion and restriction, and the world had responded to its call. God inherits the earth and whomever is upon it. When there is a general change of conditions, it is as if the entire creation had changed and the whole world been altered, as if it were a new and repeated creation, a world brought into existence anew. . . ."