It provided Spain with free Native-American labor to produce more crops cheaply.
Explanation:
The Spanish collected tributes and crops from Native Americans, whom they forced to work for them. Because they didn't have to pay them like they would have to with Spanish laborers, they could harvest more crops for trade and export for a lower cost. This built Spain's economy, allowing even more power and conquest of the New World.
The main way in which the causes of the enlightenment were similar to the causes of the industrial revolution was that both focusses on the "common man" instead of the elite.
The core Idea was manifest destiny. God gave us power so why not use it? Whenever we kicked mexico's behind we realized we could really accomplish this ambition