Finding root causes is a frustrating affair since all causal regressions are functionally infinite. This frustration understandably lends itself to a pragmatic, but arbitrary point being chosen as the initial link in the causal chain. This point almost always is characterized as a prime mover by way of the move being initiated through an entity's free will. Because of bias, this arbitrary point ends up being a point which suits the observer's interests, which will have their narrative diverge (drastically in some cases) from that of observers whose interests conflict.

We're watching different movies because we can't square our pragmatic need for freewill, our individual biases, and a determined universe.