This parallel coordinates chart compares countries across multiple demographic dimensions, including happiness, environmental concern, and membership in groups like religious or professional organizations. Grey background lines show all data for context, while blue foreground lines can be filtered by brushing along an axis, which hides unrelated countries. Built with d3.v3, it uses d3.svg.brush and d3.svg.axis to support interactive dimension dragging and brushing. Data comes from the local total4.csv file, with most values normalized to a 0–100 scale.