This chart is very pretty and colorful, but all it’s really doing is plotting a single variable, population size, against the arbitrary names of political subunits. It’s hard to read and difficult to extract any information about relationships from it. I think the creators need to go back and re-read (or read for the first time?) Edward Tufte.
This is what you get when someone is told to make some visual candy that really pops, rather than to transform information into a visual medium. My eyes are simultaneously stimulated and offended.