TeaDranks made a great cartogram showing the entire world with every country's size scaled to its population.
One neat thing about this one is that unlike with some cartograms, the basic shapes of the countries are very recognizable. Such low-population, large-area Anglophone nations as Canada and Australia nearly vanish from the map, though, while the nations of the Indian subcontinent swell enormously. Russia also shrinks from being a giant of land mass to only a mid-sized country as judged by population. You can also see that Nigeria really dominates the West African landscape in terms of actual population in a way that conventional area maps don't reflect.
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