An independent judiciary serves several critical functions in a democracy, including protecting individual rights, upholding the rule of law, and ensuring checks and balances among government branches. It interprets laws and evaluates their compliance with constitutional principles, safeguarding against governmental overreach. The judiciary also resolves disputes impartially, contributing to social stability and trust in legal processes. Moreover, by having the authority to review legislation, it ensures that laws align with democratic values and principles, thus maintaining the integrity of the democratic system and preserving citizens' liberties.