Answer: The 18th Amendment
Explanation: The Twenty-first Amendment repealed the Eighteenth Amendment in 1933, making the Eighteenth Amendment the only amendment to the U.S. Constitution ever to be repealed in its entirety.
Fair Labor Relations Act<span> (which </span>guaranteed<span> workers rights to organize and led to more than 800,000 women joining </span>unions by the end of the 1930s) and Fair Labor Standards Act. This has lead to the 19th amendemnt to the constitution for women voting
The message in the quotation is that a colonist will never feel the need for independence unless something changes within him and becomes uneasy and unpleasant to live with that feeling that something must be done about it. A colonist will never feel the necessity for independence, only free men feel it.