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It's called the Anthropic principle and it accounts for the fine tuning that appears to govern the Universe without the requirement of a diety. "We" as the observer are here to see, due to the conditions that came before. Change the conditions and you would not be there. Much like say my father who came to Australia after WW2 and meet my mother. If he had not come to Australia my brother and sisters and I would not be here.
While there may be a series of combinations of Gravity, Electromagnitic and Week nuclear forces that can account for star formation the large scale structure of the Universe would be harder to support. This Universe exists due to the the values of all 4 of the fundamental forces. Who is to say that the Big Bang created a Multiverse of which we are just one that can support life due to the constants of the 4 forces. There may be other Universes adjuscent to ours that look and are VERY different due to just a slight change in the value of the electromagnetic force.
In the end you are here so enjoy it, no matter how it came about.
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