What principle allows citizens to introduce amendments to the Constitution?

The principle that enables citizens to introduce amendments to the Constitution is direct democracy through voter initiatives. This practice empowers the electorate to propose and vote on changes to the state constitution directly, rather than relying solely on elected representatives. In states that allow voter initiatives, citizens can gather a specific number of signatures to place an amendment on the ballot, thus engaging directly in the legislative process.

This approach is indicative of a democratic system where public participation is emphasized, allowing for a more responsive governance structure that reflects the will of the people. By utilizing this mechanism, citizens can address issues they believe are important and initiate changes that may not be considered by the legislature.