I don’t know much about the British organization Christian Aid (though I presume this means it is a Christian aid organization), but they have this pretty cool interactive map that shows global poverty & development over the years. Below is just a screen grab so here’s a link to the map.
Tom Paulson is founder and lead journalist at Humanosphere. Prior to operating this online news site, he reported on science, medicine, health policy, aid and development for the Seattle Post-Intelligencer. Contact him at tom[at]humanosphere.org or follow him on Twitter @tompaulson.