The population of the Earth has officially surpassed the 7 Billion mark.  http://www.guardian.co.uk/environment/2011/oct/23/why-population-growth-costs-the-earth-roger  A fascinating lecture concerning the math of growth (versus available resources) can be seen here: http://www.youtube.com/watch?v=F-QA2rkpBSY&list=PL6A1FD147A45EF50D&feature=plpp

If watching that lecture doesn't inspire you to commit seppuku, you can take some comfort that the UN predicts the global population to peak at 10 Billion and start going down again.  In fact, they predict that in just 75 years, we'll be back to 7 Billion.  http://overpopulationisamyth.com/content/episode-5-7-billion-people-will-everyone-please-relax This is based on the measured rate of change of growth.  The part glossed over is "why" mankind would flip to negative growth.