How did ideas similar to those expressed in the passage contribute to Spanish imperialism in the 18th century?

The government used the conversion of indigenous peoples to Catholicism to establish control of a territory.
The Catholic Church used the sanctioning of religious missions by the government to command new territory.
The missions built by the Catholic Church were created to protect settlers arriving in newly established colonies.
The spread of Catholicism was used to integrate indigenous peoples into the social hierarchy of the colonies.