"Toms has shown that quantum gravity causes asymptotic freedom in all the gauge couplings. This is handy if you want to show that all forces unify in a single (very weak) force at very high energies." David, What does this mean, every force is unified into ONE force, altho weak, at very high energies? What is a force and what is very high energy? Speaking in layman's terms of course to the best of your understanding.