Enacted in 1920, the 18th Amendment (or the Prohibition Amendment as it is referred to) is only a mere 111 words long. It reads:
Section 1. After one year from the ratification of this article the manufacture, sale, or transportation of intoxicating liquors within, the importation thereof into, or the exportation thereof from the United States and all territory subject to the jurisdiction thereof for beverage purposes is hereby prohibited.
Section 2. The Congress and the several States shall have concurrent power to enforce this article by appropriate legislation.
Section 3. This article shall be inoperative unless it shall have been ratified as an amendment to the Constitution by the legislatures of the several States, as provided in the Constitution, within seven years from the date of the submission hereof to the States by the Congress.
With the ratification of the 21st Amendment in 1933, Prohibition was repealed. Since then, issues related to the enforcement of/regulation of social mores and values have not been added to the Constitution. That is not say that attempts have not been proposed to the Constitution with regards to social issues. Proposed amendments related to abortion, marriage, flag burning, and school prayer, for example have all failed.
Do you believe that any issue related to values will be added to the United States Constitution? (Remember — it takes 2/3 of both Houses of Congress and 3/4 of the states to pass an Amendment to the Constitution.)