Listen to what happens when talking with defenders of free will. If they have a reason for believing in free will, it shows that it was not their choice to believe in free will. It is one of the funniest things I have ever seen. At the same time, it is tragic that people are unable to understand why free will is an illusion and how knowing it can help their lives.
I think that future generations will understand determinism and live much more peacefully than we do now. Knowing the truth almost always leads to us making better choices which are also not in our control! We don't decide what the truth is, we only discover it and act according to our beliefs. Our ideas either change or die depending on how they help us survive. Because of this, I think there could come a time when all people are generally united and won't be fighting over religion and politics.