Why does the universe have any specific order to it?
Answers
It starts with entropy, that is, the apparently iron-clad rule that says that the universe goes from order to disorder in a thermodynamic sort of way; from hotter to colder, from dense to less dense. Until the idea of Big Bang arrived on the scene, it seems that nobody was really thinking about entropy very clearly, because if they had, the old idea of an eternally extant cosmos would have pointed them directly towards a starting point of some sort.
That’s because if the universe were infinitely large and old, then an infinity ago it would have reached maximum entropy and there would have been nothing ordered in the universe; in fact, with infinity to deal with, there never would have been. No stars, no galaxies, no planets, no life, no ordered anything of any kind.
But with Big Bang, we had to consider it. .....