Some readers might be interested in this post/article just published in Nature – Human Behaviour. The title is “Why People Prefer Unequal Societies” (a slightly misleading title), and the main findings are:
Drawing upon laboratory studies, cross-cultural research, and experiments with babies and young children, we argue that humans naturally favour fair distributions, not equal ones, and that when fairness and equality clash, people prefer fair inequality over unfair equality.
Figure 1: Income inequality in Europe and the United States, 1900–2010.
Figure 2: The actual US wealth distribution plotted against the estimated and ideal distributions across all respondents:
Figure 3: Percentage of children earning more than their parents, by birth year.