You're leveraging a lot on that "if" and downvoting my comment. Almost exclusively in the modern world, famine is caused by politicians. So the answer lies in

You're leveraging a lot on that "if" and downvoting my comment. Almost exclusively in the modern world, famine is caused by politicians. So the answer lies in removing the cause of the problem. Developing technology to counteract the cause of famine, a cause that should solve the problems of food distribution....? It makes very little sense. Merely convincing the populous that food could be in short supply has caused people to hoard food, thereby making a short supply. This caused people to starve to death while the hoarders looked on the starvation as evidence of the need to hoard food. Technology cannot correct stupidity