In political science, the initiative (also known as popular or citizen's initiative) provides a means by which a petition signed by a certain minimum number of registered voters can force a public vote on a proposed statute, constitutional amendment, charter amendment or ordinance, or, in its minimal form, to simply oblige the executive or legislative bodies to consider the subject by submitting it to the order of the day. It is a form of direct democracy. It has also been referred to as "minority initiative," thus relating it to minority influence .

The initiative may take the form of either the direct or indirect initiative. Under the direct initiative, a measure is put directly to a vote after being submitted by a petition. Under the indirect initiative, a measure is first referred to the legislature, and then only put to a popular vote if not enacted by the legislature. In United States usage, a popular vote on a specific measure is referred to as a referendum only when originating with the legislature. Such a vote is known, when originating in the initiative process, as an "initiative," "ballot measure" or "proposition."

Brief history of popular initiative

The initiative is only available in a certain minority of jurisdictions. It was included in the Swiss Federal Constitution in 1891, permitting a certain number of citizens (currently 100,000) to make a request to amend a constitutional article, or even to introduce a new article into the constitution. Right of initiative is also used at the cantonal and communal level in Switzerland; many cantons allow initiatives to enact regular non-constitutional law, but the federal system does not. If the necessary number of supporters is reached, the initiative will be put to a referendum about two or three years later; the delay helps prevent short-term political moods to introduce themselves into the constitution. The parliament and government will both issue their official opinions on whether they recommend voting for or against the proposed amendment, and these opinions will be printed on the ballot. The parliament may also pass an alternative amendment suggestion which will also be included on the ballot; in this case, the voters cast two votes, one for whether or not they want an amendment, and one for which one they want, the original one from the initiative or the one introduced in parliament, in case a majority decides for amending. A citizen-proposed change to the constitution in Switzerland at the national level needs to achieve both a majority of the national popular vote and a majority of the canton-wide vote in more than half of the cantons to pass. The vast majority of national initiatives introduced since 1891 have failed to receive voter support.

Provision for the initiative was included in the 1922 constitution of the Irish Free State, but was hastily abolished when republicans organised a drive to instigate a vote that would abolish the Oath of Allegiance. The initiative also formed part of the 1920 constitution of Estonia.