Quote by George Orwell
You can only rule over a subject race, especially when you are in a small minority, if you honestly believe yourself to be racially superior, and it helps towards this if you can believe that the subject race is biologically different.
Summary
This quote suggests that in order to effectively dominate a subordinate group, particularly when one is in the minority, the ruler must sincerely consider themselves racially superior. It is advantageous for this belief to be supported by the notion that the subordinate race is biologically distinct. The quote implies that the belief in racial superiority provides a psychological justification for the ruling group to exercise control and maintain dominance over the subordinate race.