My overarching research interest is the evolution of sociality. For over 25 years, my research has focused on the causes and consequences of sociality in one of our closest relatives, the gorilla. There are two species of gorillas and four subspecies. Gorillas are a particularly interesting species because they occupy a wide range of habitats across Africa and exhibit variation in their social structure, feeding ecology, and life history patterns. I am examining topics related to gorillas’ ecology, social behavior, reproductive strategies, population dynamics, endocrinology, and genetics.