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A principle proposing that causality is subject to a conservation law—that the total amount of causal structure in the universe remains constant. Conservation of Causality suggests that you can't create new causes or destroy old effects; you can only rearrange causal relationships. This has implications for time travel (you can't create paradoxes because causality is conserved), for quantum mechanics (entanglement redistributes causality), and for free will (our choices are causal transactions, not violations). It's causality as a budget: you can spend it, but you can't print it.
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