"Shawn Achor While we might have different definitions of happiness, the triggers for happiness are similar worldwide. It’s a deep social connection. The breadth and depth and the meaning in our relationships is one of the greatest predictors of long-term levels of happiness we have. Some of the top researchers in positive psychology found that only 10 percent of our long-term levels of happiness are based upon the external world. Ninety percent of our long-term happiness is how the brain processes the world we find ourselves in."