Opiate is humanity's hunter gatherer stage.
Humans had no concept of time, wondering around aimlessly for food.
Their only logic is fight or flight.
They began eating opiates and similar plants, causing them to evolve some.
Undertow is when humans discovered fire and cooking meat.
Humans began to realize the patterns of seasons and the cycles of harvesting crops:
"Cries of the carrots, for them it is the holocaust."
AEnima is two stories split by the middle track Intermission.
The 1st half "Anima" is about humans developing basic weapons and tools, inventing the wheel, writing, learning to grow abundances of crops, and the early stages of trading.
The 2nd half "Enema" is about humans developing basic math, sanitation, swimming, and the early stages of boats and exploration.
Salival is about the transition of tribes growing into societies, the development of measuring systems such as weights, lengths and time.
And the development of boats, chariots and the earliest wars.
Mer De Noms, Lateralus and 13th Step are parallel, happening roughly in the same time period.
Mer De Noms represents ancient Egypt,
Lateralus represents Israel, and
13th Step represents ancient Greece.
It shows how these early civilizations first encountered and influenced each other, trading crops, inventions and medicines.
It also shows how the earliest religions developed.
eMotive is the rise of the Roman Kingdom.
10,000 Days is about the birth of Christianity and the splitting of the Roman Empire into the Eastern and Western empires, hence the song Right In Two.
V Is For Vagina is about the fall of the Roman Empire and the spread of Christianity.
V is actually for Roman numeral 5.
Conditions Of My Parole is about the development of the Bible, and the migration and massive spread of Christianity.
Money $hot is about the Middle Ages.
Eat The Elephant is about the Holy Roman Empire, political conflicts within Christianity and the Thirty Years War in Europe.
Fear Inoculum is about the European migration to the 7th continent North America.
Existential Reckoning is about the birth of the United States.
This encyclopedia predicts there will be one final album from all three bands:
APC's final album will be about the invention of the radio and World War 1.
Tool's final album will be about World War 2 and the invention of the television.
Puscifer's final album will be about the Vietnam War era and the birth of the computer age.