small world
/smɔːl ˈwəːld/adjective
In form small-world. Of a network, especially a social one: having nodes that can be reached from every other node in only a small number of hops, despite nodes not being neighbours of most other nodes; relating to or involving such a network.
Origin
Early 17th century (in an earlier sense). From small + world, after French microcosme microcosm or its etymon post-classical Latin microcosmos microcosmos.