The biggest thing facing human kinda at the moment is 1 - Selfishness this is since almost everything else would be fixed,
If we were not so selfish then 2- poverty would be almost non exsistant, if we shared and were not so into the self we would give more to those in need!
If we were not so selfish then 3- global warming would may not come for a lot longer time from now.. we all want this now and need the technology now so that I can be number one! i need a hummer, i need a mansion, i need 5 vehicles, i need to buy fancy toys for my kids which they will never touch and just fill landfills. less i needs and more think of it doesntr matter what people think, maybe lets ride my bike to work this mornign to be eco friendly, and global warming would not be here!
If we were not so selfish then 4- child slavery would not be in place, since we would not cheep out on kids paying them a peny a day, and would think of society instead of self and share the money that was income.
If we were not so selfish then 5- lack of belief would increse due to the idea of being not as focused into oneself, and has a moral belief of helping others and being kinder, if more belief then world would be happier and all around better.
therefore if the world was less selfishthen all the main problems in the worls would be gone or decreased.