What disappears inside a national average?

Countries can improve on average while wealth remains concentrated within one country. Compare the unit of observation before comparing the trends. Wealth shares and life expectancy measure different things.

Read on through a shared source

What does a visualization let you notice? →A color map controls how differences reach the eye. Moving bubbles can expose patterns over time. In both cases the encoding influences what viewers can detect.

Compare the passages

1% of America has 40% of all the nation's wealth

Wealth Inequality in America · ▶ 4:40–4:57

Inequalities within countries these bubbles show country averages, but I can split them

Hans Rosling's 200 Countries, 200 Years, 4 Minutes - The Joy of Stats - BBC · ▶ 3:25–3:41