Julian Barbour's 2020 book arguing that the arrow of time does not require a special low-entropy beginning — in a timeless configuration space, complexity grows in both temporal directions from a central minimum-complexity state (the Janus Point).
Proposes an alternative to the Past Hypothesis: the universe does not need a special initial condition to explain time's arrow — the arrow emerges naturally as complexity grows away from a dynamically inevitable minimum in both directions.
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