The quantum theory which states that all possible quantum universes can exist simultaneuously. It solves the Schrodinger cat problem by stating that the universe splits at each quantum junture, and hence the cat is alive in one universe and dead in another.

In other words, everything that can happen, does happen (just in seperate worlds). Every possibility plays itself out in one universe or another.

When you eat dirt for the first time and leave your family to build a shack in the woods