The Easterlin Paradox, which says money doesn't buy happiness, has been re-evaluated. After studying data from many countries over decades, it's clear that richer countries tend to have happier people. There's no limit to how happy wealthier countries can get. People in countries with higher GDP per person are generally happier. As countries grow economically, people's happiness tends to increase too. So, having more money can make people happier, regardless of what others have.