America emerged from the Great Depression and the Second World War with a much more equal distribution of income than it had in the 1920s; our society became middle-class in a way it hadn’t been before. This new, more equal society persisted for 30 years. But then we began pulling apart, with huge income gains for those with already high incomes. As the Congressional Budget Office has documented, the 1 percent — the group implicitly singled out in the slogan “We are the 99 percent” — saw its real income nearly quadruple between 1979 and 2007, dwarfing the very modest gains of ordinary Americans. Other evidence shows that within the 1 percent, the richest 0.1 percent and the richest 0.01 percent saw even larger gains.
By 2007, America was about as unequal as it had been on the eve of the Great Depression — and sure enough, just after hitting this milestone, we plunged into the worst slump since the Depression. This probably wasn’t a coincidence, although economists are still working on trying to understand the linkages between inequality and vulnerability to economic crisis.