"John Leslie is thought provoking:
“One striking thing about the fine tuning is that a force strength or a particle mass often appears to require accurate tuning for several reasons at once. Look at electromagnetism. Electromagnetism seems to require tuning for there to be any clear-cut distinction between matter and radiation;
--for stars to burn neither too fast nor too slowly for life’s requirements;
--for protons to be stable;
--for complex chemistry to be possible;
--for chemical changes not to be extremely sluggish;
--and for carbon synthesis inside stars (carbon being quite probably crucial to life).
Universes all obeying the same fundamental laws could still differ in the strengths of their physical forces, as was explained earlier, and
random variations in electromagnetism from universe to universe might then ensure that it took on any particular strength sooner or later.
Q: Yet how could they possibly account for the fact that the same one strength satisfied many potentially conflicting requirements, each of them a requirement for impressively accurate tuning?” [Our Place in the Cosmos, The Royal Institute of Philosophy, 1998]."
Uncommon Descent
