What are the motifs in A Theory of Justice by John Rawls?

Democracy is a recurring idea. Rawls suggests that the principles upon which a just society is structured are particularly compatible with the form of government known as a constitutional democracy. He prioritizes what he calls the principle of (equal) participation, which "requires that all citizens are to have an equal right to take part in, and to determine the outcome of" the political and legal process. He elaborates that this includes the stipulation of one citizen, one vote, and the assurance that elections are fair and free, and regularly held.