My own data analysis confirms a strong link between economic envy and unhappiness. In 2008, Gallup asked a large sample of Americans whether they were “angry that others have more than they deserve.” People who strongly disagreed with that statement — who were not envious, in other words — were almost five times more likely to say they were “very happy” about their lives than people who strongly agreed. Even after I controlled for income, education, age, family status, religion and politics, this pattern persisted.

It’s safe to conclude that a national shift toward envy would be toxic for American culture.

Unfortunately, in the wake of the Great Recession, such a shift may well be underway, given the increasing anxiety about income inequality and rising sympathy for income redistribution. According to data from the General Social Survey, the percentage of Americans who feel strongly that “government ought to reduce the income differences between the rich and the poor” is at its highest since the 1970s. In January, 43 percent of Americans told the Pew Research Center that government should do “a lot” to “reduce the gap between the rich and everyone else.”

Why the shift? The root cause of increasing envy is a belief that opportunity is in decline.