In Mesoamerica, Aztecs did many things. They built their capital in a lake with a great double-pyramid. This double-pyramid was used for special ceremonies and rituals. One of those rituals was sacrificing slaves. The Aztecs believed that by sacrificing slaves by using their blood and hearts, this blood would go to their God. They believed their God needed blood to make the sun rise, set, and to make the world function.
Today in America, some states allow there to be prison labor. In my opinion, I think prison labor should be made with careful consideration. If we allow prison labor, prisoners get a chance to pay off their debt little by little. However, if we use prison labor, there is a risk that prisoners may not do their jobs right, just so they can get what they want.