Well, a modern economy is pretty thoroughly different from the premodern one. When it took 90% of the population working in agriculture to feed the whole population (nonfarmer/farmer ratio of 1:9), and food transportation costs were extremely high, then even a minor shortfall in food production could induce famine conditions in short order. Now that the nonfarmer/farmer ratio in an industrialized economy is more like 97:3 (and moving toward that figure elsewhere) famine is decreasingly caused by shortfalls only, and increasingly by other factors. Fundamentally, though, it's about productivity.

And there's no obvious reason why productivity will be going down in most places in the world, nor why transportation should be getting more expensive. I think short-term oscillations in political fortunes are not a very good marker of these things.