(The europeans could have easily repeated the conquest of the middle east by the

(The europeans could have easily repeated the conquest of the middle east by the greeks and romans with the crusades but had no reason; they did with the age of sail and ending of overland trade; they did so with WW1, and could do so today with ease. The problem is that without need for flood river agriculture, or the silk road, or oil there is no value to the middle east, and low iq, low trust people are incompatible with eastern and western civilizations.
The only reason for the expansion of islam by force was the exhaustion of the two indo european civs of europe and persia bt fighting each other. Every ethicity that conquered under islam was subsequently defeated by the nest wave of barbarians the most recent the Turkics. Even the golden age was persian, and that was reversed by 1000 by conversion to fundamentalism.
Despite recovering from the indo european conquest of the world resulting in the bronze age collapse after 1200bc every civ other than the west managed to stagnate or decline by 800ad having exhausted the agrarian revolution. Yet if not for overextension, plague and wars of migration, ther is no reason why rome didnt invent the industrial revolution before 800ad. They had the technologies. But without the english problem of needing pumps to drain mines
Explaining why the west recovered from semitic superstition and others didnt, and why every other civ stagnated before and after the brone age collapse, is the answer to social science: It only matters who innovates adapts fastest. Islam justifies and manufactures ignorance. and worse, irresponsibility for self regulation, and especially evasion of truth before face.)