This interactive choropleth map visualizes global population by country, with each nation color-coded according to population size using a threshold scale and a blue sequential color palette. Hovering over a country highlights its borders and displays a tooltip showing the country name and exact population figure. The visualization loads geographic data from a TopoJSON file and population statistics from a TSV file, then renders the map using `d3.geoMercator` projection and `d3.geoPath`. Tooltips are implemented with the d3-tip library, while the queue library manages asynchronous data loading.