What words in the mayflower compact established a belief in self-government?

The Mayflower Compact begins with the phrase "We, whose names are underwritten," which emphasizes the collective agreement of the signers. The document states that they are creating a "civil body politic" for their better ordering and preservation, highlighting the idea of governance established by the consent of the governed. This reflects a foundational belief in self-government, as the settlers committed to making laws and decisions through mutual consent rather than being imposed by external authority.