Malthus was wrong.
Hans Rosling, "What Stops Population Growth?"
http://www.gapminder.org/videos/what-stops-population-growth...
In Malthus's model, new people only consume food and breed. But we do this other cool thing, too, we also think about human problems and how to solve them. We all add resources to the computer of humanity.
Some really cool, like Norman Borlaug, go around the world and teach people how to grow more reliable crops, stopping famines, increasing the reliability and scale of the food supply while lowering the resources it takes to produce the food. It's sometimes said he's saved a billion lives. He did so without increasing the strain on others, but by spreading knowledge and increasing efficiency, maybe even lowering the strain on the planet.
Humanity's ability to solve problems isn't in a flat linear relationship with how many people we have either. If we just have 100 people, they all have to farm all the time, and can't stop and think about much. With a billion people, we get economies of scale, so we just need 40% to be farmers, and we can have, say, 20% work on logistics, 10% work on massive aqueducts and public infrastructure, and 10% be scientists and inventors.
At a certain point, every additional person makes it easier for more people to survive on the planet. And yes, there is some raw physical limit to population on this rock... but visit the Russian Taiga, Wyoming, Namibia, or Mongolia. We're nowhere near that point yet, it's several orders of magnitude away. And if you note Rosling's points, we probably won't keep growing anyway.
He notes that population growth is really a switch towards health systems with lower infant mortality. You have previous generations that keep having 10 kids because only one or two of them will survive, then the health conditions improve and suddenly all of them survive. The next generation or so reverts to normal family planning, having just one or two kids. Malthus was wrong to suggest that people just breed as much as humanly possible.
All that said, I don't think you should be downvoted for asking a question. If we buried every premise we disagreed with, we'd never get a chance to lay out the reasons we believe the opposite, we'd never convince anyone. We'd just be insisting on dogmatic agreement, rather than any actual understanding of the complex issues.