Wine as a product arises from human connections in know-how and trade as much as from the natural environment in which grapes are grown. At each stage of decision-making about growing grapes, making wine, selling and drinking it, people with different roles are networked together into systems of production and distribution. The authors in this collection offer new studies of the individuals and groups who act as connectors in these networked systems, intermediating in the delivery of wine from growers' vines to consumers' glasses. These actors operate at multi-layered scales of geography or within multiple regimes of governance, all the while taking account of arbitrations of quality and taste. This collection highlights how intermediators in many different wine countries and periods of history are, and have been, significant agents of continuity and change in the wine industry.