This choropleth visualizes global population using a Natural Earth projection. Countries are drawn as SVG paths via `d3.geoPath` and a `d3.geoNaturalEarth1` projection, with fill colors assigned from a sequential blue scale (`d3.scaleSequential`) based on population values from a CSV. Countries lacking matching population data receive a random light blue fill. The map uses TopoJSON for feature parsing and is rendered at full viewport size.