jackwalker44 6:16 am on 07/01/2016 World @HappinessRpt ’16 World @HappinessRpt '16 edited by Helliwell, Layard & Sachs https://t.co/wP5P3hD3uJ personal&national variations… pic.twitter.com/cViXUGoQH0 — Jack Walker (@_JackWalker44) March 18, 2016