The Party is not concerned with perpetuating its blood but with perpetuating itself

The older kind of Socialist, who had been trained to fight against something called 'class privilege' assumed that what is not hereditary cannot be permanent. He did not see that the continuity of an oligarchy need not be physical, nor did he pause to reflect that hereditary aristocracies have always been shortlived, whereas adoptive organizations such as the Catholic Church have sometimes lasted for hundreds or thousands of years. The essence of oligarchical rule is not father-to-son inheritance, but the persistence of a certain world-view and a certain way of life, imposed by the dead upon the living. A ruling group is a ruling group so long as it can nominate its successors. The Party is not concerned with perpetuating its blood but with perpetuating itself.

G. Orwell, Nineteen eighty-four (1949), 239-40