Researchers have many different yardsticks for measuring income — and all of them show a widening gap between the rich and everyone else.

Researchers can help us gauge how evenly societies distribute the wealth their economies generate. That distribution has grown markedly top-heavy, especially in the United States,.

A shockingly large share of the world's wealth has come to rest in the hands of a shockingly small percentage of the world’s population.

How long and how well we live depends to a great degree, the evidence shows, on the level of economic inequality within our societies.

Systematic discrimination against people of color continues to help concentrate wealth at society’s economic summit at the expense of society’s least privileged.