Kiwigirl Kiwigirl:
Famine isn't caused by overpopulation - it's caused by people not being able (for whatever reason) to produce food.
Famine is a shortage of food, so to say that a shortage of food is caused by a shortage of food isn't a worthwhile statement. The reason you alluded to in saying "for whatever reason" - that's what's important.
Overpopulation, government and/or economics instability, climate effects, poor conservation practices - these things among others cause famine, not a shortage of food production.