How Far Do You Agree With the Big Bank Theory?

How far do you agree with the big bank theory? Is it even possible for us to predict how the universe have started, provided that billions of years ago, all physical laws could have been entirely different from the present ones? One question of mine would would be that, is there anything in the universe having the speed of mo thani? Let's concenter it on the big ban one question purpos. How did physicists come up with the bigbank theory? It's not that so somebody, it sounds like somebody dreamt it up and everybody said, ok, let's agree to this. No, i agree with this. I don't agree with is. It's not politics.