The Tenth Amendment. Powers reserved to the states

Powers not delegated to the United States, nor prohibited to the states, are reserved to the states or to the people.

Structure of governmentProposed 1789Ratified December 15, 1791

What it does: Powers not delegated to the United States, nor prohibited to the states, are reserved to the states or to the people.
Time to ratify: 2 years from proposal to ratification.
Era: The founding (1787–1800)
Source: National Archives: the amendment’s text and ratification

Around 1791. What else was in the record.

Decisions and events within six years of ratification.

1787

Rights and powers · September 17, 1787 · Founding

Thirty-nine delegates to the Constitutional Convention in Philadelphia sign the proposed Constitution and send it to the states for ratification.

1788

Rights and powers · June 21, 1788 · Founding

With nine of thirteen states, the threshold set by Article VII is met and the Constitution is established among the ratifying states.

1789

Rights and powers · September 24, 1789 · Founding

Congress establishes the federal court system and sets the Supreme Court at six Justices.

1789

Rights and powers · September 25, 1789 · Expansion of rights

The First Congress sends twelve amendments to the states; ten are ratified in 1791 as the Bill of Rights.

1793

Landmark cases · 2 U.S. 419 (1793) · 4–1

Yes. Federal judicial power extended to suits brought against a state by a citizen of another state.