From the bleeding edge of the "The meaning of life is to improve the quality of all life" battle front:

Jeff McMahan wrote in "The Meat Eaters" about the question of our moral responsibility when it comes to our ability to control predators in nature, and he later followed it up with "Predators: A Response" , responding to the commotion of absurd and offensive comments the article had received (from people that obviously hadn't read the article, or who didn't pay attention while reading it).

Thank you, Jeff McMahan, for doing all that legwork.