Complex sentence: Concurrently, many of the friars were discontent with the corruption of European society, including, at times, the leadership of the Catholic Church, and saw New Spain as the opportunity to revive the pure spirit of primitive Christianity.
Split into simpler sentences: Concurrently, many of the friars were discontent with the corruption of European society, including, at times, the leadership of the Catholic Church. They believed that New Spain was the opportunity to revive the pure spirit of primitive Christianity.