" while personal income in the U.S. more than doubled between i 96o and the 19gos in constant dollars, the proportion of people saying they are very happy remained a steady 30 percent. One conclusion that the findings seem to justify is that beyond the threshold of poverty, additional resources do not appreciably improve the chances of being happy. "

― Mihaly Csikszentmihalyi , Finding Flow: The Psychology of Engagement with Everyday Life