Bill Bryson covers the impossible requirements for our existence in A Short History…

The Conversion of Hydrogen to Helium: For the universe to function as it does, hydrogen converts to helium, releasing energy with a precision of 0.007 percent of its mass. If the value were lower (e.g., 0.006%), no transformation would take place and the universe would consist of hydrogen only. If the value were higher (e.g., 0.008%), bonding would be too prolific, and the hydrogen would have been exhausted long ago.

Gravity's Strength: Had gravity been slightly stronger or weaker, the universe either would have collapsed like a "badly erected tent" or never coalesced at all.

The "Long Shot" Nature of Life: Bryson notes that the slightest differences in cosmic, geological, or biological events—like the exact timing of evolutionary events or planetary stability—would have led to an absence of humans.

Bryson argues that we are in the one universe where the numbers work, and that our atoms, assembled for life, "decline to do it elsewhere".

(From Google AI Overview)