How does deliberative democracy differ from deciding politics through competing self-interests?

Deliberative democracy differs from politics based on competing self-interests by shifting the focus from the aggregation of private preferences to the quality of the decision-making process. While systems driven by self-interest rely on competition and political power to achieve outcomes, deliberative democracy emphasizes an exchange of information and justifications aimed at securing the public good.1

In this framework, citizens are expected to move beyond private concerns and biases, instead arriving at decisions through reason and the collection of competing arguments. As the philosopher Jürgen Habermas argued, human interaction in its fundamental form should be communicative—aimed at mutual understanding—rather than strategic, which is aimed at achieving individual, self-interested goals.12

Habermas posited that legitimate political decisions are produced when participants are motivated by the "unforced force" of the better argument, free from nonrational coercion. Ultimately, deliberative democracy asserts that political legitimacy is grounded in fair procedures and open, public discussion, ensuring that outcomes are publicly justifiable to all citizens rather than merely reflecting the dominance of specific interests.21