Account-1: @bill_easterly (Twitter)Account-2: @humanprogress (Twitter)Account-3: @bill_easterly (Twitter)Scholar: HumanProgress.orgDate: Tuesday, September 19, 2017Body: Hard to believe that airlines represent progress, but in 1800 it took 6 weeks to travel from New York to Chicago HT @humanprogressLink: https://twitter.com/bill_easterly/status/910239146320347136Social Action: featured in a tweet