The slightest changes in almost any of the basic parameters of nature would have led to a universe without stable stars or without stars at all.
Here is a simple analogy. Imagine a planetary rover lands on the north pole of a planet, and the humans controlling it wish to drive to the south pole.
One of the advantages we have in our study of nature is our ability to observe an entire “unpolluted” universe.
Let’s look at how timing across multiple orders of magnitude brought together cosmic and human events.
The universe did not begin with a cosmic snow globe, or an accident at the CERN accelerator. It had to begin with Georges Lemaître’s “Cosmic Egg.”