 Democracy is a uniquely publicly egalitarian way to make collective decisions when there is substantial disagreement and conflict of interest among persons about how to shape the society they share. Each can see that the only plausible way of overcoming persistent disagreement over how to shape the society they all live in, while still publicly treating all persons as equals in the face of bias and fallibility, is to give each person an equal say in the process of shaping that society. Thus, democracy is necessary to the realization of public equality in a political society. Within the framework determined by this publicly realized equality, persons are permitted to attempt to bring about their more particular ideas about justice and the common good that they think are right.