The circle on the map above, while covering only a small mathematical area of the Earth, happens to contain more than half of the global population. Redditor valeriepieris who made the image, also adds a few more things about this Winkel Tripel projection.
Additional things I’ve realized: There are more Muslims in the circle than outside of it. There are more Hindus in the circle than outside of it. There are more Buddhists in the circle than outside of it… The circle pulls all of this off while being mostly water and including the most sparsely populated country on earth (Mongolia).