Atlantic: Income Inequality Enrages Monkey
Many humans have highly developed senses of fairness and morality. Some monkeys may not be far behind. Watch as one gets cucumbers and the other gets delicious, delicious grapes.
The author says that income inequality tends to makes us unhappy. That needs qualifiaction. The degree of national inequality is not that relevant to personal happiness. People don't evaluate their personal lives in those terms. Inequality figures in when we are talking about people in our immediate socal networks, especially neighbors and family. As some have quipped, inequality is when my brother-in-law makes 10% more than I do.