There is a theory on how this universe was created... It is called 'The Big Bang' However it is based on the fact that something happened billions of years ago and that before it happened there was 'nothing'...
"Bib Bang", like evolution, is another case of a dead theory walking. Nobody with brains or talent believes it anymore:
The bullshit physics and cosmology of the 20'th century are rapidly going away. Big Bang doesn't pass any sort of a basic sniff test for common senswe or logic and was never based on anything better than a faulty interpretation of redshift data.
Having all the mass of the universe collapsed to a point would be the mother of all black holes; nothing would ever "bang" its way out of that.
Likewise a certain number of gullible Christians who ought to know better hear about the big bang and decide they like it, that it's just another version of their own creation story, give or take a few billion years. That of course is bullshit: the idea of a supposedly omniscient and omnipotent God suddenly deciding it would be cool to create a universe while the idea had never occurred to him in the infinite space of time prior to that is idiotic, and equally idiotic if the space of time is six thousand years or 14 billion years.
In real life, cosmic redshift cannot be interpreted as velocity or distance, the universe is not expanding, the big bang never happened, the universe, like God, is eternal, and the creation stories we read in antique literature refer to the creation of our own living world and local environment, and not the entire universe.
Ninety Nine point something percent of the universe is in plasma form. The one force in nature which can agglomerate plasma into solid objects including galaxies and strings of galaxies, stars, and planets, is the Z-pinch effect of the Birkland currents which move through cosmic plasmas.
The history of all stars and planets is basically governed by plasma physics phenomena.