Saying causality is not built in or doesn't exist is madness. How otherwise would things in the universe exist and interact. Time and space is two sides of the same coin, both fundamental to any existence at all. And causality is just the same thing as space-time - that which exists must by necessity always change, interacting with itself or "other" "things" (fundamentally it's always interacting with itself, existence manifesting itself in everchanging state).