 How do just institutions shape our wants and aims and affect the sort of people we become? The institutions of interest to Rawls are those that make up a society’s “basic structure”. These are the institutions that make social cooperation possible and productive. They include the political constitution, the structure of the economy, legalized forms of property ownership, the family in some form, and others. Rawls defends two principles of justice as regulations for the basic structure of his just society: (1) the equal liberties principle, according to which each person has the same claim to a fully adequate scheme of basic liberties. (2) and a second principle that specifies two conditions that must be satisfied in order for socio-economic inequalities to be permissible. These conditions are fair equality of opportunity and the difference principle.