In a representative democracy, the citizens elect the representatives that best share their opinions about important subjects.
The elections are free to fair. Each adult has one vote. Democratic rules and mechanisms are set in the constitution, and they are all agreed by the representatives. F.e the elections are done with secret ballots are done periodically; there is freedom of speech and association.
The democratic decisions are more elaborate and involve more people, debates proposals, discussions, analysis and research will lead to a better decision making.
The societies are diverse, and people have different opinions, interests, and morals. Those various points of view can be represented into different political parties. As a result of representatives with a different point of views.
Principles of democracy are the equality of rights. Regardless of gender, economic status, educations, religion, and ethnicity; which guarantees certain fairness among the people.
Democracy has internal mechanisms that prevent unfair situations and also can regulate mistakes. F.e the separation of the legislative, executive and judicial branch. : :