The Aztec Industrial Scale (~1300 – 1521 CE)The 'force' we learned of earlier, the Aztecs call tonalli, and they hold that it concentrates in the blood and in the head. The pyramid is not a tomb and not a temple in our sense. Rather, an extraction tower, built tall to put the operation where the yield goes.Lifting the still-beating heart once cut from the victims body is peak-yield of tonalli.