https://www.scientificamerican.com/article/is-inequality-ine...
>Wealth inequality is escalating in many countries at an alarming rate, with the U.S. arguably having the highest inequality in the developed world.
>A remarkably simple model of wealth distribution developed by physicists and mathematicians can reproduce inequality in a range of countries with unprecedented accuracy.
>Surprisingly, several mathematical models of free-market economies display features of complex macroscopic physical systems such as ferromagnets, including phase transitions, symmetry breaking and duality.
An interesting article that argues that wealth inequality is inevitable in a free market system which does not have non-market measures that counteract the tendency to oligarchy.