In the Epilogue of Guns, Germs, and Steel by Jared Diamond, history can be approach by concentrating one's attention on historical patterns that remain puzzling after the effects of major environmental factors. In doing so different continents and their environment have been taken into account. The first part of Diamond's epilogue states that "the term history of people of the different continents have been due to difference in their environment." Hence, because of this certain …showed first 75 words of 1457 total…

…showed last 75 words of 1457 total…Chin, notably druing the madness of the cultural revolution in the 1960s and 1970s when a decision one or few leaders closed the whole country's school systems for five years." Hence, the real problem in understanding China's loss politically and technological preeminence to Europe is to understand China's chronicle unity and Europe's chronicle disunity. These answers again lie in the environment and are suggested by Ibn Battatu extraordinary travels of Eurasia and the intercommunicating zone.