Judicial review serves as a vital check on legislative power, ensuring that laws align with constitutional principles. Courts can invalidate legislation deemed unconstitutional, thereby upholding the rule of law and protecting individual rights. This process promotes accountability, as legislative bodies must carefully consider the implications of their proposed laws. Judicial review can also lead to significant political and social change, as courts interpret constitutions in ways that may expand or restrict rights. The balance of power among branches of government is essential to maintaining democratic integrity.