Although Mariano Moreno was a criollo he did not work with the other criollos of Buenos Aires who sought to promote political changes against the privileges of the Spanish - born .
A criollo is a Spanish citizen born in the Americas .
Although Mariano Moreno was a criollo , a Spanish citizen born in the Americas , he did not work with the other criollos of Buenos Aires who sought to promote political changes against the privileges of the Spanish - born .