I'd say it would be Catholicism
So the labelling theory is a social interactionist theory of sociology. The labelling theory explains that over time a person can accept what they have been labelled and enter the self fulfilling prophecy which leads them to accept and become that label. For explain if a teacher labels a student as badly behaved and treats them like they are badly behaved, over time they become badly behaved.
Oligarchy is the rule of the few in a generic way where on the other hand aristocracy is a form of governing where administration or power is in the hands of a special class of people. Aristocrats are connected to royal families through blood, whereas an Oligarchy is not.
They used Viceroys who governed the colonies.