What is the only amendment to be ratified entirely by state conventions rather than by state legislatures?

Question

Quizplus · Accepted Answer

The Twenty-First Amendment, which ended Prohibition, is the only amendment to have been ratified entirely by state conventions rather than by state legislatures. This method was chosen to potentially speed up the ratification process and to bypass state legislatures, which might have been under the influence of powerful liquor interests.

What Is the Only Amendment to Be Ratified Entirely by State