Sparks Timeline of World History

In this map of world history designed by John Sparks for Rand McNally, time runs on the y-axis and the composition of the world population over time is displayed on the x-axis. In this map of world history designed by John Sparks for Rand McNally, time is on the y-axis and the composition of the world population is displayed on the x-axis. In this design, Sparks highlights the rise and fall of empires over time. Image accessed on a Course site held at York University.