And another reason, noted by the UN and many NGOs serving such areas is that the PTB (either the local dictator, the area warlord, or whoever) steals the largest percentage of the food for themselves or to sell to their "constituents". That is when they even let the UN/NGOs into the country. We could end starvation tomorrow, but I don't think there are enough troops in the world available to take over all of the countries that need to be taken over.