Of the 148 candidates for domestication, Eurasia had 48% of these species, with most of the other areas of the world having most of their big mammals become extinct about the time that humans began to colonize the area. Although those who existed on other continents may not have had as much opportunity to domesticate, they still failed miserably at domesticating the animals at their disposal, and this is the next point that Diamond investigates.
Diamond explains that cultural differences were not a problem with domestication, and uses five pieces of evidence to refute this theory, the rapid acceptance of Eurasian domesticates by non-Eurasian peoples, the universal human penchant for keeping pets, the rapid domestication of the Ancient Fourteen, the repeated independent domestications of some of them, and the limited successes of modern efforts at further domestications. Many of the peoples that had been without domesticated animals acquired a huge evolutionary advantage once they adopted the techniques that had been presented to them. The Khoisan people in southern Africa who acquired domesticated sheep and cows displaced many of the hunter-gatherers that had dominated the area, and once