Mexico is strsangling on its own birth rate. Mexico needs to export 25,000,000 people per ten year period to stay even with its rate of deterioration.
China has solved its problem with imposed reproductive restriction and forced abortion. Were it not for that, China would have self-destructed.
Most of those millions of people who are said to have AIDS in Africa have never actually been tested for AIDS. Any person who shows symptoms that MIGHT be indicative of AIDS is counted as having it. The problem is that the same symtoms are also indicative of (and hugely more likely to be) malaria, dysentary, cholera, typhus, tuberculosis, etc., etc., etc.... In other words, it's a manufactured crisis, and just like global warming, it the proposed solutions just happen to coincide with the socialist agenda: AIDS research, AIDS awareness and homosexual rights, income redistribution, devolvement of national sovereignty to international agencies, and overall growth of bureaucratic government. In other words, it's all your fault, whitey.
And as for famine, as P.J. O'Rourke says, famine is almost never caused by lack of food. It's usually caused by the inability or unwillingness of those in charge of the starving people to give them food, whether it's the incompetence of central planning or the blasted economies where food itself is currency and, therefore, power. There was plenty of food in Somalia, for instance; but the warlords kept it for themselves.