Many organic cycles in nature mirrors this, most obviously animal populations. And when you look at the human population over the past handful of hundreds of years, what do you see? Exponential rise, a rocket taking off. But the food supply is limited, and we will eventually hit a hard cap. We will top off at 9-11 billion people. And once we reach the top, what will happen? We will have some percentage drop.
I thought until recently that millions of people, perhaps hundreds of million, were going to die. But no. Billions of people are going to die. And there is a possibility that it will happen within our lifetimes.
I'm going to fucking bed. Hopefully I will have some less horrible nightmares than this.
The food supply, as any resource, is somewhat limited, but that limit is not hard capped. Advances in production technology can rise that limit radically. In fact, that is what has made possible to sustain current population density.
I don't really know what have made you suddenly worry about it.
Those 'advances' have included unsustainable practices that yield poorer and poorer quality foods using petroleum based fertilizers, vast amounts of diesel fuel, and toxic pesticides (that kill off bees etc) not to mention GMO blah blah blah. It's not a good situation. Not to say that more sustainable advances can't happen, but it's going to have to happen pretty fucking fast to reverse damage done while contending with rapidly changing climate. The information is out there, but it's not being spoon few to the populace by .gov and MSM (quite the opposite). You've got to search it out.
A couple articles toward the point:
https://www.armstrongeconomics.com/markets-by-sector/agriculture/pandemic-can-hit-the-food-supply/
https://www.armstrongeconomics.com/markets-by-sector/agriculture/global-cooling-reducing-food-supply/