Account-1: @humanprogress (Twitter)Account-2: @humanprogressDate: Tuesday, December 1, 2015(Twitter) Likes: 33 likesViews: 41 viewsBody: While still below the world average, Africa's per person GDP is rising, esp. since the 1990s http://buff.ly/1Nljg4I Link: https://twitter.com/humanprogress/status/671870665331486720Social Action: authored a viral tweet