If we assume that the present universe came from a big bang, then at the instant of the big bang all the mass of the universe was well within the radius of what would be a black hole. And nothing is supposed to be able to come out of a black hole.
But yet, it emerged from that.
I think by definition, the universe is still inside it’s own space, and can’t get out of it’s own space, so by definition is a black hole. Everything in the universe (including light) is inside the universe, and can’t get out of the universe sort of idea.
What caused the Big Bang? What was behind the cause? What than was the origins of the cause and what did it develop from? what was behind the development of the development? Gee this is some far out crap!