Birth countries on the left. Where the family lives now on the right.
Band thickness = number of people who made that journey.
Each family member sets their birth location and current location in their profile. The Sankey builds automatically from that data — no extra steps, no spreadsheet.
When you see Mexico → USA and India → UK → USA side by side, the shape of the family's migration becomes visible for the first time. This diagram did not exist before ECO.
Every new member who joins and sets their locations adds to the diagram automatically. The Sankey updates in real time — no one has to maintain it.