New historical discovery: the change in development terminology from 1821 to 2012

This helpful development map (HT the Blattman; original)  from 1821 shows by comparing country labels then and now the evolution of development terminology: 1821 label => 2012 label

Savage => Fragile States

Barbarous => Low Income

Half Civilized => Developing Country

Civilized => Emerging Market

Enlightened => G8

Awesome graphic: Earth's center of economic gravity returning to location of 1 AD

One major caveat: the projection from 2010 to 2025 is not to be trusted, based on the dubious assumption that China's rapid growth will continue (that one will require a whole future post).

Sources: this version of this widely circulated graphic is taken from WSJ. Personal HT to Chris Blattman, where I first saw it.