I believe that my all time favorite reason for God continuing to allow the suffering on earth today, is the one that says the angels need proof that man cannot rule himself. One would think that by now, any half-witted angel could see that man will always hurt each other. Man will always be greedy and try for domination of others who do not think like he does. I could not be even 1/10th of 1% as intelligent as an "angel", but it seems pretty obvious to me that man will always be in conflict in some form on this earth. By Dub reasoning, that makes angels pretty stupid if they haven't figured it out yet.
That's just my humble thinking on the matter.
CCS