My understanding of the universe is that
evolution of closed systems depend on the state of the system at a prior time. Then we invoke the principle of causality which includes all known physical laws determining the evolution of the system. However, when a person is say imagining something, isn't he undergoing the process of changing the state of his being and thereby making a subtle but noticeable impact on his surroundings. This should create a causal chain of events that would have not otherwise happened. In short, free will has something to do with the evolution of the universe, at least on human-like scale.

Coming on to the part of existence of free will, special relativity states that the chronological order of events are not defined and that if we are to believe that we live in a block 4D universe which is unchanging, then free will doesn't exist. Is there a counter argument to this? This would also explain quantum entanglement by saying that the universe already know what's gonna be measured in the future so it always keeps the spins of the entangled pair in a consistent fashion. Why isn't Einstein right about it then?