Average life expectancy varies a lot by location, gender, and race. International comparisons done by the original study conclude that the US is falling behind the rest of the industrialized world.
From a design point of view, take a look at the below version of the map from the original study — the use of a higher contrast color scheme and non-linear legend ranges results in a more striking view of the results. I’m not sure which one I like better. The top one is more information rich and cleaner – but the bottom one slaps you in the face with meaning.
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