Why did the aztecs engage in human sacrifice?

In honor of their gods

Since Aztec people were idol worshipers and they believed in some inhumane rituals. Though the Aztecs likely saw human sacrifice as crucial to their survival, yet scholars and historians believe that Aztec human sacrifice was performed in honor of their gods.

no , per capita income is not a true measure of the development because: -it only tells us about average income not how income is distributed among the people.it only give us an idea of the economic aspect.it is only at the qualitative basis.moreover, income is not only the way of development other factors are also as much as important as income.