The Big Brain Theory demonstrates in a fully structured way that the universe is a kind of computer, brain or neural network. Later, it uses this demonstration to explain how to materialize anything from micro to macrocosm, including the universe. After that, it performs a test to demonstrate how difficult it is to overthrow it. The Big Brain Theory also introduces possible hypotheses to questions such as: What exists? What are we? What is soul? Does God exist? What is life? What is death? All of this is done in an impartial, objective and coherent way without delving into any science or contradicting the logic of nature. The Big Brain Theory is ideal for those who want a worldview 100% logical.