Social Behavior Among Monkeys May Be More Nature Than Nurture ScienceDaily (Dec. 4, 2003) — An unusual experiment with monkeys who were switched between mothers shortly after birth has demonstrated the importance of nature over nurture in behavior. Rearing Young monkeys reared by a mother other than their own are more likely to exhibit the aggressive or friendly behavior of their birth mothers rather than the behavior of their foster mothers, a University of Chicago researcher has shown for…