A radial hierarchy displays fictional family trees, mapping birth years to distance from a central "God" root and using angular position for siblings. The visualization marks each decade with labeled concentric circles, while node colors vary by depth. Built with D3.js, it uses `d3.layout.tree` with radial projections and `d3.svg.diagonal.radial` for curved links, rendering as SVG. Data comes from a local JSON file, and the layout stretches years onto a 360-degree circular space.