I think the low entropy in the early universe was mostly/entirely due to gravity- a uniformly mixed universe could collapse into denser regions in lots of ways,

I think the low entropy in the early universe was mostly/entirely due to gravity- a uniformly mixed universe could collapse into denser regions in lots of ways, but (eg) one black hole at the other end of time is very high entropy. "According to the Big Bang theory, the Universe was initially very hot with energy distributed uniformly. For a system in which gravity is important, such as the universe, this is a low-entropy state (compared to a high-entropy state of having all matter collapsed into black holes, a state to which the system may eventually evolve)." https://en.wikipedia.org/wiki/Entropy_as_an_arrow_of_time#Overview https://en.wikipedia.org/wiki/Entropy_as_an_arrow_of_time#Ov...