An eco-village or ecovillage is intended to be a socially, economically and ecologically sustainable intentional community. Most aim for a population of 50-150 individuals because this size is considered to be the maximum social network according to findings from sociology and anthropology (Hill & Dunbar, 2002). Larger ecovillages of up to 2,000 individuals may, however, exist as networks of smaller "ecomunicipalities" or subcommunities to create an ecovillage model that allows for social networks within a broader foundation of support. An ecovillage usually relies on: