"For several millennia, people have worried about whether or not they have free will. What exactly worries them? No single answer suffices. For centuries the driving issue was about God’s supposed omniscience. If God knew what we were going to do before we did it, in what sense were we free to do otherwise? Weren’t we just acting out our parts in a Divine Script? Were any of our so-called decisions real decisions? Even before belief in an omniscient God began to wane, science took over the threatening role. Democritus, the ancient Greek philosopher and proto-scientist, postulated that the world, including us, was made of tiny entities—atoms—and imagined that unless atoms sometimes, unpredictably and for no reason, interrupted their trajectories with a random swerve, we would be trapped in causal chains that reached back for eternity, robbing us of our power to initiate actions on our own." - Maitani