Concepts of politico-economic and social equality and inequality have always accompanied the history of mankind. But it is especially in the contemporary world, with a real return to the middle ages, a marked inequality prevails in developed societies. In these, status’ differences are accentuated and are linked to the conflict between the classes and the rejection of social solidarity: the situation is worsened through the prevailing doctrines of extreme liberalism of laissez faire laissez passer and neo-liberalism. Key words: Equality, inequality, solidarity, social unrest, liberalism of laissez faire laissez passer, neo-liberalism.
Keywords: Eguaglianza, diseguaglianza, solidarieta, disagio sociale, liberismo, neoliberalismo.