In Guns, Germs, and Steel,how does Diamond explain the fact that it was Europe and not Southwest Asia that ended up spreading its culture to the rest...

Diamond
actually does not make that broad an argument. Instead he simply argues that European cultures
spread farther, but that they were the beneficiaries of advancements first made by Middle
Eastern and North African cultures.

The obvious examples of Mideast cultural
spread are monotheistic religions, Judaism, Christianity, and Islam that all began in the Near
East. Hierarchical societies and centralized states also began in the region, only later
spreading to Europe. Alexander the Great conquered Persia and Egypt and spread these ideas and
systems to Europe.

Later technology that Europeans used was also Mideastern
or African, algebra, Arabic numerals, navigation, iron and steel swords and armor, cavalry
armies. Gunpowder, guns, and cannons all came through the Mideast from China. Part of how Europe
differed was that they had a more brutal warfare tradition. The Greeks and Romans, and later
European...