“In the absence of people, nature would establish its own balance among species. But having shaped (and disrupted) the natural environment so extensively, humans can’t very well wash their hands of responsibility for what happens when certain species over-expand. Hunting is one way to keep wildlife numbers in check, for the good of people, plants, land and other animals.”
http://reason.com/archives/2013/12/05/the-new-case-for-hunting