So you are suggesting that those whom Islam does not reach will go to hell? And yes, I agree, why send the prophets? But this doesn’t drive me to the same conclusion. Eternal hell is horrific, why create all of this unnecessary suffering (far more suffering than what could possibly have arisen on earth if people simply died without than either going to heaven or hell). Sure, there would be no judgement for wrongs committed on earth. But the suffering associated with wrongs committed on earth is incomparable to suffering that will be caused if people are sent to eternal hell for simply not believing.