Before Humans, Solar System, Milky Way, Galaxys or Space-Time for thet matter. Nothing existed that what was called Nothingness, Emptyness or Ambyss. After more then eon or secounbd passed, it can't be said it passed because Time like Time didn't exist, Chaos was 'born'. Everything was in Chaos and Chaos was everything. Eon after eon passed and three laws emerged, Order, Space and Time. Space and Time were inseparable and Chaos was no more, at least for now. Order as the oldest set rule that 'ended' Chaos, "Everything will have its order". Space, "Everything will be somewhere", and Time "Everything was/is/will be sometime".
After millenia of fixing and stopinng Chaos, new Laws were 'born' thay were Fate/Desteny (depending on who you ask), Biginning, End and Karma. Thair laws were "Everything will have its fate/desteny", "Everything will have its biginning", "Everything will have its end", "Everything will have its consequences". These we the laws of seccound generation, thay were in harmony with first generation. After long and uneventful three millenia, two new laws were 'born' these were Good and Evil, thay were inseparable but were always in disagreement. This was creation of famous Yin and Yang, in every evil there will be good, and in every good there will be evil. As third generation, they should be on good terms with secound and first generation, but were nor because of thair constant disagreement thay would fight and cause chaos which infuriated Orded and she forcibly balanced each other.
After three eons new laws were 'born', which were the combination of all Laws exept Order. Thay were Life and Death, "Everything will be born sometime" "Everything will die sometime", and now Order was afaid that situation with Good and Evil will repeat but her fears were baseless as Life and Death were like diffrent sides of same coin thay didn't get along well but were not openly fighting, which Order could accept.
With 'birth' of Life and Death, Order gatherd other Laws and proposed idea of creation something so absourd that it might work. All Laws combined and created Omniverse predecessor of all Mltiverses and Universes, when thay created it, thay created beings that will exist, after short millenia stronger beings were born and thay had called themselfs Rulrs of Omiverse or sort Daitys. How much thay were arrogant shows hat thay created thair own Multiverse and ruled over them and tried to take over as strongest beings. Of caurse Laws won and thay ran with tail between thair legs. Law of Karma and Law of Desteny 'cursed' Deitys that history will repeat itself.
Inside Multiverse beings were born that rose from others and were much stronger thn them, thay formd group and called them selfs Gods. They didn't know abot existance of Laws and lanched rebellion agenst Deitys, even if thay lost thay, being immortal, can't die now thay created thair universe. Being weeker then Daitys thay could only create one domiante species. In one of infinite Universes, in Galaxy Milky Way, Planet Earth one God created Humans as dominate species thay had no power, but thair intelect was advanced. Other Gods focused on streanght or speed that thay neglected Mind of thair creations.
Gods were dissatesfyed with Daitys and thay waged war that lasted for eons and eons, this war is called Last War because all Daitys and Gods led thair creations into this war. But one God wanted nothing but peace, God Of Lve and Pece and this was the creator of Humans. In legends this was end of Peace and comeback of Chaos, Laws said thay won't involve themselfs in this war but were forced to do so. Because if thay didn't, War would bring back Chaos that Order didn't want. Laws came up with briliant plan and that was GREAT RESET, everything in Omniverse, Multiverse and Universe will cease to exist.
And like that, everything, every matter, atom, being, existance cease to exist, exept one God an his Universe that didn't participate in Last War, but its inhabitants were destroyed. And Laws give him power that he become a Daity, and with that power God/Deaity creted Humans angain but much smarter and more capable. New rules were set, Gods and Daitys were forbidden to fight and to show themselfs infront of thair creations.
New Era of Pace begun and it lasted for 200 eras, but something went wong, Humans being more superior to almost every spices wanted more. Thair intellect evolved more and thay become God-like beings, new era arrived it was Comeback of Chaos, everyime Laws tried to stop Chaos it will come back, and Laws, especially Law of Order didn't like that. But even if thay don't like it, it doesn't mean it won't happen. That's how Chaos came back, someone will push one domino and everything will fall apart. Again everything was in Chaos and Chaos was everything. That's how Era of Laws ended and Era of Chaos begun again, everything didn't exist anagin.
But nothing lasts forever Era of Chaos ended with birth of Laws and thay were Order, Space and Time, Sapce and Time were inseparable and thay created Omniverse after 'stopping' Chaos.