According to the Huffington Post, “Amid the millions of births and deaths around the world each day, it is impossible to pinpoint the arrival of the globe's 7 billionth occupant. But the U.N. chose on October 31, 2011 to mark the day of that occupant's arrival with a string of festivities worldwide, and a series of symbolic 7 billionth babies being born.” I contend that the milestone is nothing to celebrate; rather, it should have served as a wake-up call for us all, lest the species continue undaunted to maximize itself right out of existence. Both the slope and its relative abruptness, evident in a historical perspective, ought to have given us all pause in our assumption that our species would necessarily go on without either self-regulation or a drastic correction from nature.
Source: UN Population Division
The full essay is at "The Human Species as an Ecologically Maximizing Variable: Religion as a Catalyst?"