This example visualizes the ten most populous countries as a minimalist bar chart with no axes, using rectangles whose widths encode population values. The chart is built with React and D3 v5, where `d3.csv` loads United Nations World Population Prospects 2019 data, `scaleBand` positions countries vertically, and `scaleLinear` maps population to horizontal bar lengths. Each bar is rendered as an SVG `<rect>` inside a React component, with state managing the asynchronous data loading. The visualization intentionally omits labels and gridlines, emphasizing raw proportional differences between countries.