But humans don't have any free will, we have the perception of free will. The entire universe is deterministic. From the Big Bang onward, physical laws have determined how every atom and sub atomic particle interacted. Those interactions, despite the mind boggling complexity, have all been predictable. To say otherwise is to say that there is some force in the universe not bound to physical laws, which is a matter of faith. Those interactions have resulted in you and I, each of us with a brain that is made of particles that are bound by the same physical laws that have been playing out for billions of years.

If we could reset the universe to the Big Bang and guarantee that its starting conditions were exactly the same, everything would happen exactly as it did before.