TO REALLY UNDERSTAND THE BACKGROUND TO LABOR AND ITS VARIOUS FORMS IN THE NEW WORLD

including paid labor, servitude, slavery, etc, you have to read something like John H Elliott's account Empires of the Atlantic World , and his references. 

 

The whole account is a very very far cry from the wailing about strictly negro North American slavery with which liberal Americans are inundated with daily, and all day.

Another extraordinary account is Colonists In Bondage.

Bailyn's Voyagers To The West is also very useful.