The structure of the universe involves much more than fine-tuning
just gravity and the electromagnetic force. Two other physical forces
also relate to our life.

These two forces operate in the nucleus of an atom, and they give
ample evidence of forethought. Consider the strong nuclear force,
which glues protons and neutrons together in the nucleus of the atom.
Because of this bonding, various elements can form—light ones (such as
helium and oxygen) and heavy ones (such as gold and lead). It seems
that if this binding force were a mere 2-percent weaker, only hydrogen
would exist. Conversely, if this force were slightly stronger, only
heavier elements, but no hydrogen, could be found. Would our lives be
affected? Well, if the universe lacked hydrogen, our sun would not
have the fuel it needs to radiate life-giving energy. And, of course,
we would have no water or food, since hydrogen is an essential
ingredient of both.