Learn more: http://www.khanacademy.org/video?v=r1ywppAJ1xs Thomas Malthus's views on population. Malthusian limits.
This is a succinct (but not perfect) summary of Malthusian ideas on population. What do you think of his ideas? Any specific parts of his theory that you agree with? Do you disagree with some of his ideas? What did history have to say about it?