Population
2. no growth, population aging. This is actually the norm in most of western Europe and Australia; they would be in the same shape were it not for immigrants, Their birth rate is actually below the population sustainability rate. This is why Great Britain and France will become Muslim nations within a couple of generations. The UK already accepts Sharia law.
3. In the U.S., we grow more food than we can eat, and more food than we can distribute.
4. This is not just a U.S. situation. See # 2 above. In the U.S. certain states will become majority Hispanic, while others will become heavily influenced by Muslims and Sharia law.
5. As far as illiteracy goes, it's pretty much the norm that wealthy white nations have a low birth rate while poorer populations have a higher birth rate. Population growth among Muslims is high for a variety of reasons, one of which is that assimilation is easier than warfare.
Anyone who thinks the world is overcrowded hasn't travelled much between the Mississippi River and California. You can go for miles between neighbors. The entire population of the world would fit in Texas if we all lived in one big city.