Read the full article at The Guardian.

Cecilia Mo thought she knew all about growing up poor when she began teaching at Thomas Jefferson senior high school in south Los Angeles. As a child, she remembered standing in line, holding a free lunch ticket. But it turned out that Mo could still be shocked by poverty and violence – especially after a 13-year-old student called her in obvious panic. He had just seen his cousin get shot in his front yard.

For Mo, hard work and a good education took her to Harvard and Stanford. But when she saw just how much chaos and violence her LA students faced, she recognized how lucky she had been growing up with educated parents and a safe, if financially stretched, home.

Now, as an assistant professor of public policy and education at Vanderbilt University, Mo studies how to get upper-class Americans to recognize the advantages they have. She is among a group of scholars trying to understand how rich and poor alike justify inequality. What these academics are finding is that the American dream is being used to rationalize a national nightmare.

It all starts with the psychology concept known as the “fundamental attribution error”. This is a natural tendency to see the behavior of others as being determined by their character – while excusing our own behavior based on circumstances.

For example, if an unexpected medical emergency bankrupts you, you view yourself as a victim of bad fortune – while seeing other bankruptcy court clients as spendthrifts who carelessly had too many lattes. Or, if you’re unemployed, you recognize the hard effort you put into seeking work – but view others in the same situation as useless slackers. Their history and circumstances are invisible from your perspective.

Here’s what has gone wrong: hard work and a good education used to be a sure bet for upward mobility in the US – at least among some groups of people. Americans born in the 1940s had a 90% chance of doing better economically than their parents did – but those born in the 1980s have only 50/50 odds of doing so.

As the dream has faded, however, its effects have not. Several elements of normal psychology combine to keep many across the economic spectrum convinced that the rich and the poor deserve what they get – with exceptions made, of course, mainly for oneself.

This error “lays the groundwork for beliefs that would tend to justify [systemic] inequality,” says Arnold Ho, principal investigator for the psychology of inequality lab at the University of Michigan.