Capitalism is an economic system whose main characteristic is that workers are not owners of the capital and vice versa. Nowadays it is the prevailing system in almost all countries of the world. The main role in its development was played by the industrial revolutions that enabled the mass production and the establishment of the market as we know it today. There were major wars in the world in the first half of the 20th century that shook the survival of capitalism and created alternative arrangements such as socialism, but these ideas did not prove to be adequate for the needs of the world economic, and capitalism quickly regained primacy. With the development of information technology over the past thirty years, the world has become fully globalized and handed over to the free market. While this has had positive effects, such as reducing world poverty, criticism has begun to emerge that capitalism increases inequality among citizens. That is also the main hypothesis of this thesis. The Lorenz curves and the Gini coefficient was theoretically explained, and was used alongside the available statistics to investigate the hypothesis and trends of inequality in the world over the last fifty years, since modern neoliberal capitalism was established.