" Until relatively recently, and with a very few exceptions, cannibalism would have been regarded as anything but normal. As a result, until the last two decades of the 20th century, few scientists spent time studying a topic thought to have little, if any, biological significance. Basically, the party line was that cannibalism, when it did occur, was either the result of starvation to the stresses related to captive conditions. It was as simple as that. Or so we thought. "

― Bill Schutt , Cannibalism: A Perfectly Natural History