The problem is more of over consumption than over population, but I can see why the two would be confused because their is significant overlap. However I find

The problem is more of over consumption than over population, but I can see why the two would be confused because their is significant overlap. However I find the "over population" argument a red herring to make wealthy Americans feel better. I can assure you if we cut the population of the planet in half but consumed at US levels, that is unsustainable. Just like if we double the population but consume at India levels we'd be fine.