The American philosopher John Rawls revisited it and proposed a new perspective of justice based on social equity. To base justice on equity in this way is to hope that the principles jointly agreed upon by the partners under the "veil of ignorance" cannot be violated or called into question by them once they are engaged in civil life. To this end, the consequence is the solidarity that binds the different partners. This solidarity does not lead to equality of opportunity but to equitable equality of opportunity, in order to give everyone the chance to succeed and develop. Therefore, this presupposes the setting up of basic structures, which are the basic institutions. Thus, through the principle of equal freedom, John Rawls demonstrates that freedom is a sacred principle that must be granted and guaranteed to individuals without restriction. Through the principle of difference, the author of the Theory of Justice points out that the fight against social inequalities proceeds from the upliftment of the minority strata.