If the universe is deterministic, as physics laws say, how can we have free will? Can we admit that everything we do is just a result of previous state of universe? Is free will just an illusion?
In this book Daniel Dennett tackles this question but I'm not sure I'm satisfied with the answer. He says that one does not exclude the other. Yes, the universe is deterministic on the physics scale, but a complex creatures like us can exert free will and make decisions on biological scale.
And really, how could be any different? If universe has any random element, then we don't have free will, but rather act randomly. We need deterministic framework to exercise free will.
It is, after all, just one of the many weirdness of our existence.