I agree with Mister Money Mustache's stance on children. I firmly believe that the decision to have children, as well as the number, is a personal decision and shouldn't be influenced by anyone other than those involved. I'll admit, back in the 1800s when the survival of children couldn't be guaranteed, it might have been unwise to only have one child. But this is the 21st century. The negative mindset surrounding only children is outdated. In addition, there's a huge body of research that heavily suggests the stereotypes surrounding only children, that they're more selfish, spoiled, and antisocial than other children, are completely untrue.  
The article is useful because it can function as an eye-opener to readers. It forces readers to consider an option they might never have considered otherwise. This article can trigger the same epiphany in readers that Mister Money Mustache himself had.
The article in question can be found here: http://www.mrmoneymustache.com/2014/09/10/great-news-youre-allowed-to-have-only-one-kid/
A website I highly recommend is Cartogracy.com. Cartogracy.com presents an interactive map of the current conflicts going on in the world. It breaks down the conflicts by trending and inactive, the general category they fall into (public unrest, insurgency, or war), and their causes (political, ethnic, economic, religious, or international). Upon selecting the conflict, you can find out the number of casualties, the number of people displaced, the goal of the conflict, the opponents, an up-to-date summary of the conflict, articles about the conflict, and recent news regarding the conflict.
|A breakdown of the Boko Haram conflict, as presented by Cartogracy.com|
 Frank J. Sulloway, "Birth Order, Sibling Competition, and Human Behavior." In Conceptual Challenges in Evolutionary Psychology: Innovative Research Strategies, edited by Harmon R. Holcomb (
Dordrecht and : Kluwer Academic Publishers,
2001), pp. 39-83.<http://www.sulloway.org/Birth_Order_(Sulloway-2001).pdf> Boston
 Sandler, Lauren. "The Only Child: Debunking the Myths" Time. Time Magazine, 28 July 2010. Web. 4 October 2015. <http://content.time.com/time/magazine/article/0,9171,2002530,00.html#ixzz2jdfI1mAh%5D>