The universe is deterministic.

It's godless and neutral, and defined only by physical laws. The marble rolls because it was pushed; the man eats because he's hungry; an effect is always the result of a prior cause. The life we lead, with all its apparent chaos, is actually a life on tramlines. Prescribed. Undeviating. Deterministic.

I know it doesn't feel that way. We fall into an illusion of free will, because the tramlines are invisible, and we feel so certain about our subjective state. Our feelings, our opinions, judgments, decisions...

But if we live in a deterministic universe, then those decisions can only have been the result of something prior. Where you were born, how you were brought up. The physical construction of your particular brain. It's the nature/nurture matrix. It's more complex, more nuanced, but still... at the end of the day, cause and effect.