ancient civilizations would make human sacrifices 

 the run-off from the furnaces would be discharged to water sources like rivers 

 the discharge from the human sacrifices contained lye that would make clothes cleaner than water from any part of the river’s course. 

The locals then used the discovery of lye to invent soap that is actually used to clean clothes.

  without human sacrifice, there would be no progress in humanity 

  the first soap was made of heroes

the process of manufacturing soap is brutal and demands sacrifice because animals have to be slaughtered in the process and bodies harvested to generate the state of cleanliness. 

The process of making soap thus signifies the brutality that exists in the world.

 The product, which is the soap that washes away all the dirt from people’s lives, is also symbolic of the pain and sacrifice that has to be made to keep the world evolving.

Think about the animals used in product testing. Think about the monkeys shot in space. Without their death, their pain, without their sacrifice, we would have nothing

the sacrifices that have to be made to keep the world clean