The data is every player named to a men's World Cup final squad from 1982 to 2026 — about 8,600 players across twelve tournaments — compiled from FIFA and Wikipedia squad lists. Each player is tagged with the club he was at during that tournament, and each club is mapped to the confederation of its national football association (UEFA, CONMEBOL, CONCACAF, CAF, AFC, OFC).
The picture is a bipartite chord diagram drawn with D3: national teams on the right (grouped and coloured by their own region), club regions on the left, and one ribbon per team–to–region flow, sized by number of players. The world-map key uses Natural Earth boundaries (via world-atlas). It all runs client-side in a single static HTML file.
Built by Marc Parrish. The underlying player-by-player CSV is available on request.