India
It's India because they needed vast caste system.
it is asking to explain one way that scholarly disciples not recorded in history have contributed the perspectives explained by Diamond. (who im presuming is the author)
´´The M.A.I.N. causes of world war 1 were Militarism, secret Alliances, Imperialism and Nationalism .The driving force was Nationalism ... The igniting incident of the ´´Great WAR´´ was the assassination of Archduke Franz Ferdinand, heir to the Austro-Hungerian Empire, in Bosnia by a serbian nationalist.
