OK, demand for food increases. Food prices therefore increase. Does that mean people must therefore starve?
Why do you assume that we can’t increase supply to match the demand? Demand increases, prices increase, suppliers look at the high prices and decide they want to get some of those profits. Around the world, the problem for farmers is LOW food prices. Farmers are going bankrupt because the world is awash in surplus food.
So why are some people starving? Every famine is the result of a political problem. Poor harvests are caused by drought or insects or what have you. Starvation is caused by political failures. Every famine in the last hundred years could have been prevented, if only the neccesary political decisions had been made. What are those? End wars. Why was there famine in Ethiopia? Because warfare meant that farmers were unable to raise their crops…if they farmed bandits/soldiers would steal their produce, or kill them. And the bandits/soldiers made it impossible for aid agencies to safely give away food. Warfare causes famine, end the war and you end the famine. Other famines, like the North Korean famine, are caused by political mismanagment shading into a deliberate policy of starvation. Starve the peasants who might oppose the totalitarian regime, reward the most loyal. If the only source of food is the state, then one must be loyal to the state or die. And of course, collectivized agriculture and state controlled economies have extremely poor productivity records compared to private farms. And even when totalitarian states don’t actually wish to cause starvation, the abscence of accountability makes starvation at most an annoyance. See Amartya Sen’s work.
If you compare food production in the US to food production in China, you are going to see some dramatic differences, notably the number of acres available per capita. The US has very low population density compared to most countries. Yet other countries with much much higher population densities than the US still manage to feed themselves quite nicely. How is it that Belgium or the Netherlands or South Korea can produce enough food for themselves, even at many times the population density of the United States?
Again, it is a mistake to think that US land use models are the only ones that are appropriate to a wealthy country. The US, Canada and Australia are atypical because of our large unpopulated regions. But Europe and Asia have many wealthy countries that are more densely populated than China and yet still manage to feed everyone easily.
One more point, about overfishing. Again, overfishing is a problem because normal market forces don’t apply. A farmer with an apple orchard doesn’t cut down his trees for firewood, because he knows that those trees will produce for him next year. But an individual fisherman has no incentive to reduce his catch no matter how hard it is on the fish stocks, because each fish that he leaves is just going to be caught by someone else. Since the stock of wild fish is a common resource there is no incentive for each individual to manage their take sustainably. A hundred years ago, it seemed as if the supply of fish was so much greater than the demand that we could treat wild fish as free for the taking. But now we know that is not the case. And so–since fish are a limited resource–we have to arrange the distribution of that resource somehow. Allowing everyone to go out in a boat and take as much as they want will lead to disaster. And so we must have some sort of regulation. But that is difficult, since fish stocks are a global resource but there is no real global governance to regulate them.
What that has to do with China becoming rich and eating everyone else’s food, I have no idea. I suppose the point was brought up in an attempt to discredit the idea that technology or capitalism could provide more food for people who wanted that food.
But the intractability of overfishing is more like pollution…if we allow people to dump wastes into the public air or water, they will do so since there is no incentive not to, even if each dumper would have a net benefit from an overall reduction in dumping even taking into account the loss of their own free dumping. This is only a failure of capitalism if we naively believe that wild fish, air, or water are free resources in unlimited quantities like we used to be able to treat them. If we recoginize that they are NOT free, then we can arrange markets in such a way as to avoid treating them as free, and suddenly the problems are manageable again.