The five interlaced rings of the Olympic flag — blue, yellow, black, green, and red — Pierre De Coubertin said in 1931, represent "the five inhabited continents of the world, united by Olympism." No continent (now region) is assigned a specific color. Perhaps that's why graphic designer Gustavo Sousa intentionally chose not to provide a legend or key for the illustrations above.
In his illustrations, Mr. Sousa assigns each color of the Olympic rings to a specific continent and then pairs it with a variety of data sets: obesity, gun ownership, McDonald's outlets, population, homicides, people living with HIV, military expenditures, Facebook users, number of Catholic priests, percentage of homes with televisions, to name a few. He requires the viewer to ponder, to reflect, to think, to make sense of the information.
As Mr. Sousa explained to Fast Company, "The rings represent healthy competition and union, but we know the world isn’t perfect. Maybe understanding the differences is the first step to try to make things more equal.”