Seriously? You seriously think we will run out of food in generations? We have enough that we could survive a doubling in population. Which no one thinks is going to happen anyway. All over the world growth rates are falling, soon enough we will top off and start to decline.
Food's just one resource, not all of them, and the problem as I understand it is a lot of the stuff we're doing to be
able to support a doubling of the population
right now is very, very much unsustainable.
But yeah, I've heard estimates (or what degree of respectability I can't remember) of it hitting 10-12 billion before it starts leveling off. I've also seen numbers hit 20 billion or more too, though both of those were a few years back. We're already feeling the resource strain -- from inability or unwillingness to see it moved in such a way to reduce suffering -- with our current population. Every extra bit just strains it further, increasing the overall suffering of our people.
It also increases the rate that what we have that
can't support a doubling of the population -- the other, even more finite than food and farming-related resources -- are consumed. The population we have now isn't sustainable, from what I've seen and read. A larger population is just going to make it burn faster.
And yes. People are starving and dying. But that does not mean there is not enough food for them, it simply means they do not have access to it. Seriously. I bet, for instance, if you moved my whole neighborhood out to a low functioning desert or some other place that is no good for growing crops you could feed like a thousand people with the farm land you would free up.
Maybe. Take it from someone in a farming community, even if not directly involved with the farming. Just because an area's green doesn't mean it's arable and able to be used for large-scale, or even smaller scale, farming.
The issues keeping people from getting food are land allotment, not having up to date technology, and shitty politics. The fact is there is not going to be a mass starvation the world over for a longer amount of time I can even think of.
And a larger population is just going to make the issue
worse. Land is as much a resource as any other, can be consumed just as readily, and (from what I understand, with said understanding being admit-ably incomplete!), is generally not a resource that is renewable in short time spans. More people means a higher demand on that land, which consumes it faster and often renders it unusable for longer periods.
There's also no guarantee (that I've seen, anyway; I'd absolutely
love to see solid evidence to the contrary) that getting up to date technology to a sufficient amount of the world's population is even
possible. A lot of the stuff that places like the US use to output massive crop surpluses take an industry base that many areas would have trouble supporting.
And as you say, shitty politics. We've fairly conclusively seen that the folks that
are capable of producing the food are either unwilling or unable to move it where it needs to be to keep people from dying. If it's bad now, how much worse will it get when the population is half again or more larger?
I will admit openly, though, that when I say few generations I'm talking the more toward the upper end of that, two-three hundred years. Even I don't think there's going to be genuinely major impacts in my lifetime, or even in the generation after mine (Though we're already feeling it and the next batches are going to feel it even harder). That's the lower end of the distance you have to be considering when you're talking species wide survival, generally, because a lot of the immediate impact stuff we do (50-100 years) won't bear its fruit until then.
Which means, yeah, most people can't be arsed to give a shit. Too far into the future to matter to them. Which, as I've been saying, is probably going to be what kills us. We're doing crap that's going to be having impact hundreds of years down the line and not giving a shit about it. It's not exactly surprising that signs are pointing to that biting us in the ass.