Initiative and referendum are processes that allow citizens to directly participate in the legislative process by proposing or voting on laws. An initiative enables voters to propose legislation or constitutional amendments, which are then put to a vote. A referendum, on the other hand, is a direct vote in which an entire electorate is invited to vote on a particular proposal, often involving constitutional amendments or changes in law. These mechanisms reflect the democratic principle of direct participation and were important elements of political reform during the era of popular movements seeking greater influence over government.