Eusociality (Greek eu: "good" + "social") is a term used for the highest level of social organization in a hierarchical classification. The term "eusocial" was introduced in 1966 by Suzanne Batra and given a more definitive meaning by E. O. Wilson. It was originally defined to include those organisms (originally, only invertebrates) that had certain features:# Reproductive division of labor (with or without sterile castes) Overlapping generations Cooperative care of young The lower levels of… (More on Eusocial)