Animal population(including humans) is a function of food availability. Here is an example: If 10 mice(5 male, 5 female) are given enough food for only 5 mice, 5 mice will die and any babies that are produced will die so there will be 5 mice left. If those 10 mice are given enough food for 20 mice, the mice will have plenty of food and any babies that are produced will live, initially the population will overshoot 20 mice, but eventually the weakest will die as there is only enough food for 20 mice to fight over and natural selection will leave 20 mice. The mice are always reproducing and so there are always "starving/dying mice"(babies and old mice) once the population reaches equilibrium with food availability. Same would happen with humans and does. Thus, as there are always starving mice, there will always be starving humans until we begin to regulate birth rates to make sure that our population never outgrows the food supply.
Here is a human example: Since the United States and other 1st world countries continually pump food into Africa and other "hungry" parts of the world to try to "eliminate" world hunger, the hungry people have enough food to allow them to reproduce, eventually the population reaches equilibrium and babies start dying(the ones you see on the tv commercials) because while there is enough food for the mother an father who conceived, there isn't enough food for baby so he/she dies just like the mice in the example. So through persistent saturation of "hungry" areas, the United States is only increasing the amount of people in these areas and subsequently are increasing the amount of starving/dying people.
Heck, if you have 4 marijuana plants and only have enough nutes for 3, eventually one will die and 3 will live.
The paths the developing world can take are few:
1. Keep increasing the problem by giving starving people food so that they can create more starving people
2. Let nature do its thing and don't feed starving people so that they begin to die off leaving fewer starving people
3. Find a fool-proof way to regulate conception so that humans are only "allowed" to reproduce when conditions are optimal
Obviously the 1st one doesn't work, we have been doing it for years. The second one isn't acceptable by most because it's inhumane. And the 3rd is where we will go eventually, but this "ethics" crap gets in the way of humans being able to view themselves as just another animal subject to the demands of a biological environment and not the end all, be all of creation.