They can group them, drill down, there are many way to make them readable. That’s the actual work of data visualization: simplify something complex to convey a message, leading the reader to the relevant data that support the message, letting them understand it.
Here nothing is readable with the exception of the big polygons, and data are absolutely unclear even when the polygon is visible
Bar charts for long lists of nations are …long. And pretty hard to read. I’m not sure this is the best solution, but it works OK.
They can group them, drill down, there are many way to make them readable. That’s the actual work of data visualization: simplify something complex to convey a message, leading the reader to the relevant data that support the message, letting them understand it.
Here nothing is readable with the exception of the big polygons, and data are absolutely unclear even when the polygon is visible