The ability for people to pass laws for themselves

This is known as the “Home Rule” in the United States.

It was also brought up in the following:
- : The idea of self-government was encouraged by the Glorious Revolution and 1689 Bill of Rights, which established that the British Parliament —and not the king—had the ultimate authority in government. ... As interference increased, colonists felt more resentful about British control over the colonies.

- United States: *Home Rule* In some states, known as home rule states, the state's constitution grants municipalities and/or counties the ability to pass laws to govern themselves as they see fit (so long as they obey the state and federal constitutions).

- Mayflower Compact: The Mayflower Compact created laws for Mayflower Pilgrims and non-Pilgrims alike for the good of their new colony. It was a short document which established that: ... the colonists would create and enact “laws, ordinances, acts, constitutions and offices…” for the good of the colony, and abide by those laws

Explanation:

self government - Popular or representative government; democracy. Self-control. Government of a group by the action of its own members, as in electing representatives to make its laws. ... An example of self-government is what the colonial people fought for in the American Revolution.