"All it would take is two or three jerky adolescent males entering at the same time to tilt the balance and destroy the culture." The delightful Dr. Robert Sapolsky, on the monk-y monkeys (baboons) now presiding over the Forest Troop he has been studying in Kenya for around 25 years. The brutish, nasty males were selectively killed off by bovine tuberculosis about 20 years ago - they were the guys who ventured out to fight neighboring baboon troops at a tourist lodge garbage dump, where the "spoils" (so to speak) included tuberculosis-tainted meat. The pacifists who stayed home turned out to be the ones who "resist taking out their bad moods on females and underlings." What a concept. Currently, their culture prevails (barring the appearance of jerky adolescent males). Kudos to Sapolsky, by the way, for putting this study in the journal PloS Biology, a peer-reviewed, online, open-access journal.