Dennis Thompson - founding Director of the Edmond J. Safra Foundation Center for Ethics, Professor of Public Policy and Alfred North Whitehead Professor of Political Philosophy in the Government Department at Harvard University - and Amy Guttmann - President of and Professor of Political Science at the University of Pennsylvania - continue their introductory series. (See part 1)
The first purpose of deliberative democracy is to promote the legitimacy of collective decisions.
This is a response to the first source of moral disagreement - scarcity of resources. Citizens would not have to argue about how best to distribute health care or how to balance environmental protection and economic growth if these goods and services were unlimited or not in conflict.
Deliberation often cannot resolve moral disagreements because there are reasonable differences about how health care or scarce organs should be distributed. But in the face of scarcity, deliberation can help those who do not get what they want or even what they need come to accept the legitimacy of a collective decision.