Craig Callender and Sean Carroll on the Arrow of Time and the Multiverse.

Over at Philosophy TV:

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According to the Past Hypothesis, the early universe was a low-entropy state, and entropy has been increasing ever since. Carroll thinks that the truth of the Past Hypothesis cries out for explanation; Callender thinks that its truth should be regarded as a brute law-like fact. They discuss this disagreement. Then (starting at 35:41) they discuss the explanatory merits of Carroll’s proposal that we inhabit a “baby universe” that is an offspring of another, higher-entropy universe.