They are fearful about "runaway" conventions making unwanted changes.
The process of constitution change is a political process and therefore there is always a risk of run away conventions coming up with unwanted and sometimes undesirable changes.
Answer:
The Royal Proclamation of 1763.
Explanation:
After Britain won the Seven Years' War and gained land in North America, it issued the Royal Proclamation of 1763, which prohibited American colonists from settling west of Appalachia.
The reconstruction period had generally good ideas which were exploited by bad people and who turned it all upside down. The idea of reconstruction was to integrate African-Americans into the society and protect their rights and enable them to educate themselves and become sophisticated and emancipated members of the society.
During the gilded age, the focus switched form social to economic reforms and because of this the reconstruction ended and many southern states reverted to their original racist ways. This is why it's called the gilded age, it only looked like everything was great but it was bad at its core, like gilded items which only look gold.