The evolution of inequalities connected to incomes wealth and capital ratio on income within the richest countries follows a U-shaped mathematical function. These analysis questioning this function called Kuznets'' curve that is connected to the hypothesis of a economic development able to mechanically produce a decrease in income disparities. Conversely capitalism is characterised by strong powers of economic divergence based on the inequality r > g i.e. return on capital > rate of economic growth. These elements emphasise how within a society growth is not connected to wealth becomes more important and belongs to a few. When the function is r