More people isn't necessarily a good way to improve living conditions, however. It is pretty common for deer populations to become unhealthy when predators are removed, for example, since with no predators they just over produce and then they all starve due to lack of tree bark. You end up with a sickly, miserable population.
Then be glad that someone else did not apply this principle to you.
After all, maybe someone out there in the world thinks that 1 person / km2 ought to be enough. Who's to say that you wouldn't be in his "TO TERMINATE" list?
And these are humans you're talking about, not deer.
Humans have more children to make up for the children who die. With fewer deaths come fewer births, to the point where many developed nations have a negative birth rate.