Harland’s book—as well as Volume 1 and the entire forthcoming series—will be an essential tool for anyone dealing with associations as a social, economic, and cultic phenomenon in the ancient world. Recently, P. Ismard has shown that associations were playing a key role for the socialization of individuals in the Greek cities as early as the Archaic and Classical periods.10 Associations did not remain on the fringes of the civic sphere. On the contrary, they were part of the social, cultural, and even institutional, functioning of cities, acting as an interface between individuals and the collectivity, as suggested by the ongoing Copenhagen Associations Project, which aims at compiling an inventory of all known private associations in the Greek world.11 This is also valid for the Jewish communities, which were embedded within Greek cities as shown by P. Trebilco,12 as well as for the first Christian groups, even if those were not as willing to cope with the political and moral order imposed by Roman rule. The discussion by New Testament scholars of the social context of the emerging Christian groups is very welcome. There is no doubt that this important contribution will help ancient historians reassess the whole issue of how crucial associations were for social relationships in ancient cities.