Whilst the distinction of ‘society' and ‘individual' has colloquial (and political) meaning, those inclined to the analysis of complex systems are more likely to ask which groups or societies are real individuals, exhibiting functional or behavioral integrity, as self-reproducing wholes. In pursuing this line of investigation, it is far more relevant to discriminate between types of groups than between groups and individuals, or even wholes and parts. It is especially helpful to distinguish feature groups from unit groups.