Some, many.. postulate that given that human population growth is geometrical, and land is finite (considered a necessary resource for food production) ... it's doom and gloom on the horizon!
"Even with a world population that continues to add tens of millions of new mouths every year, given continuing growth in Haber-Bosch fertilizer and a surprising trend toward a worldwide decline in birth rates (if you live about 50 years longer, according to the best estimates, you'll see humanity reach zero population growth), it might be within humanity's grasp to avoid mass starvation forever."
"Human population vs food supply: The key to ending global hunger"
And I quote;
"Even with a world population that continues to add tens of millions of new mouths every year, given continuing growth in Haber-Bosch fertilizer and a surprising trend toward a worldwide decline in birth rates (if you live about 50 years longer, according to the best estimates, you'll see humanity reach zero population growth), it might be within humanity's grasp to avoid mass starvation forever."