Arguably not true. Population growth rates have been decreasing in a variety of countries[1] and economists have found connections between economic growth and population growth[2].
"Plenty" is not a fact that can be disproven, it's a value judgement, and that growth rates have been decreasing does not mean the world is running out of people. Also: economic growth based on an ever-increasing number of customers is not a sustainable policy.
Arguably not true. Population growth rates have been decreasing in a variety of countries[1] and economists have found connections between economic growth and population growth[2].
[1]: http://www.amazon.com/The-Coming-Generational-Storm-Americas... [2]: http://scholar.harvard.edu/kremer/publications