Viewing from the top, each square foot (within each square) equals about
3,000,000 people. For example, 218,017,976 people are in countries with a GDP per capita between
$12,000 and $14,000. The square measures 8.5' by 8.5' or 72.5 square feet ( 72.5 x 3,008,000 or about
218 million people).
The height of the square (oblong) represents the GDP per capita : each .75 feet = $2,000. So for this population of 218,017,976 the square rises nearly 5 feet ( 7 x .75 = 5).
The largest square measures 29 feet per side or 850 sq feet ( population @ 2,558,366,717 ). The structure is only 9 inches high or GDP per capita under $2,000. This is 35% of the planet's population, a dismal number indeed. In fact nearly 75% of the people on Earth live in countries with a GDP per capita under $8,000.