It is a misnomer. With the exception of the devastation of war in general population is stagnating. Most of the western world has seen its fertility head towards the cliff of non-replacement. And in the rest of the world as education gets to more people the same happens. Many have the total population levelling off around 2050 and then beggining to decline. Population needs to be a consideration but it is not more important than climate change.
"Africa, where population is projected to quadruple from around 1 billion today to 4 billion by the end of the century. The main reason is that birth rates in sub-Saharan Africa have not been going down as fast as had been expected. There is an 80 percent chance that the population in Africa at the end of the century will be between 3.5 billion and 5.1 billion people.
Other regions of the world are projected to see less change. Asia, now 4.4 billion, is projected to peak at around 5 billion people in 2050 and then begin to decline. Populations in North America, Europe, and Latin America and the Caribbean are projected to stay below 1 billion each."
http://www.washington.edu/news/2014/09/18/world-population-to-keep-growing-this-century-hit-11-billion-by-2100/