This example presents a horizontal bar chart showing the population of the top 10 most populous countries, based on 2018 estimates from the United Nations World Population Prospects 2017. It uses D3 v5's `scaleLinear`, `scaleBand`, `axisLeft`, and `axisBottom` APIs to map population values and country names to SVG rectangles. Data is loaded from a CSV file and processed by multiplying the population values by 1000. The chart renders entirely as SVG, with bars styled in steelblue, and the code illustrates a basic data-join and margin setup for reusable visualization.