To say simply that Orientalism was a rationalization of colonial rule is to ignore the extent to which colonial rule was justified in advance by Orientalism, rather than after the fact. Men have always divided the world up into regions having either real or imagined distinction from each other. The absolute demarcation between East and West, which Balfour and Cromer accept with such complacency, had been years, even centuries, in the making. There were of course innumerable voyages of discovery; there were contacts through trade and war. But more than this, since the middle of the eighteenth century there had been two principal elements in the relation between East and West (Said 39-40).
Said, Edward. “Introduction.” Orientalism. Pantheon Books, 1979, pp. 1-29.