People regard the Aztecs’ and Incas’ religions as barbaric because they required human sacrifice. Another bloody practice was the leaders cutting their genitalia and allowing blood to flow down the pyramid steps to put followers into an emotional state.
These practices of sacrifice to gods is in the Bible. In the Old Testament, there is a lot of animal sacrifice.
Even though religious ritual sacrifice has been required seemingly since the beginning of time, we can see the human mind coming up with practical adjustments. Humans must have said, “Look, the gods need this sacrifice. We have to deliver. But, taking humans we need to work the fields and animals we need for food is really pricey. I wonder if there’s a cheaper solution?”
They found ways. The South American tribes started capturing people from other tribes and chopping them up. They must have figured the god would not notice it was a stand-in sacrifice.
The Jewish and later Christian faith found something even cheaper. There are those Old Testament stories of tossing in the first born son or the fatted calf. Smarter minds figured out a one size fits all sacrifice the god would have to accept.
In this version, the god, itself, would own the first born or fatted calf. Folks on the ground would have to give up nothing. Expensive temple sacrifice ended. The theological term is, “substitutionary atonement”.
This substitution gave an economic advantage to Christianity and it has been growing for centuries.