Some replies to the benevolent world-exploder argument take the form that even if the world were destroyed, that would or might be bad from a negative utilitarian perspective. One such reply provided by John W. N. Watkins is that even if life were destroyed, life could evolve again, perhaps in a worse way. So the world-exploder would need to destroy the possibility of life, but that is in principle beyond human power.[39] To this, J. J. C. Smart replies,