This book is about the space-time of our universe. This book is about why our space-time is 4-dimensional and why it has the observed distance function. The mathematics in this book are no more than matrices and a little finite group theory. The mathematical steps are clearly laid out and simple to follow. From this elementary mathematics, we get general relativity and classical electromagenetism; we get spinors stripped naked; we get gravito-electromagnetism; and we get the space-time of our universe. We also get an explanation of why there are three generations of matter and why the universe appears non-deterministic to ourselves. We are introduced to spinor spaces and to the higher dimensional spinor rotations within those spaces.