I Did Not Make It Up.
 On page 54 of Founding Brothers,
the Pulitzer Prize-winning book by Prof. Joseph J. Ellis, we read:
 
“Jefferson had also shared with Madison his intriguingly utopian suggestion that each generation was sovereign, so that the laws made by one generation should expire after about 20 years. Madison responded in his gentle, unassuming, but logically devastating fashion to suggest that, yes, this was a fascinating notion, but if taken seriously, it was a recipe for anarchy and ran directly counter to the whole thrust of his own political effort to establish a stable constitutional settlement that compelled the trust and abiding veneration of present and future generations of Americans.”