Thomas Jefferson wanted the Constitution rewritten every 19 years. In a letter to Madison he muses that neither the constitution nor the laws of a previous generation should apply to the current one. The 19 years part comes from the mortality tables of the time (people live for much longer now than they did then).
Thomas Jefferson argued that because no generation has a right to bind subsequent generations, the Constitution should expire every 19 years.
The US Constitution is full of grammatical errors.
Two days before signing the constitution the founding fathers drank “54 bottles of Madeira, 60 bottles of claret, eight of whiskey, 22 of porter, eight of hard cider, 12 of beer and seven bowls of alcoholic punch.“
In 1916 an amendment was proposed to the Constitution that all acts of war would be put to a national vote. People voting yes would have to register as volunteers for service in the United States Army.
Iceland are rewriting their constitution via Facebook; allowing the public to make suggestions and alterations.