If everyone had two children, would earth still be overpopulated?

I clicked yes but meant no because there wouldn't be nearly as many people as there are today.

The earth would not be overpopulated due to the lack of young deaths.

*insert misanthropic comment for attention

2 children or 1 per person, means static population growth. Add wars, which might have been less necessary as fewer people means less need for territorial expansion, and you'd actually see a decline in the population.
As time has progressed, people are living longer so there would still be a population increase, but most likely a more manageable one.
Most likely, it would be a better and healthier world today if what you are suggesting had been.
See, if there was a god, HE would have made humans infertile after 2 children and all might have been right with the world.

Hm, what happens if you have triplets?

Define "overpopulated".