Fig. 2: Network- and role-view of the countries in Folder F*.

a Graph representing the pruned network Folder F*. Colour represents community membership, and node size is proportional to strength. As with Folder A*, some communities reflect historical or geographical affinities (Table 2), but that is not the dominant pattern. b Functional role of countries according to their position in the (p, z) plane for Folder F*. The colour of points is consistent with community membership in (a). Nodes in R6 are scarce and geographically homogeneous (in contrast with Folder A*, Fig. 1b). Also in Folder F*, Africa and Asia are mostly relegated to peripheral roles (R1, R2).