This visualization displays global population estimates for 2018, projected onto a natural Earth map using d3.geoNaturalEarth1 and rendered with d3.geoPath. Circles positioned at country centroids via geoCentroid scale in size with population using d3.scaleSqrt. The map supports panning and zooming through d3.zoom, with tooltips showing population values. Data comes from UN population estimates merged with TopoJSON world atlas geometries, and both size and color legends are built using reusable d3 components.