Tip-of-the-hat to our founders, for sure! But I'd say they were architecting a government, not a society. That's a very important distinction, and without it you can end up with some really destructive Statist/Authoritarian stuff.

Regarding those first 25 years or so: Jefferson's attempt to ban slavery in 1784 failed by 1 vote. Then there was the Whiskey Rebellion in 1791 and then the Alien and Sedition Acts of 1798. So, nothing's perfect I guess...

I highly doubt they ignored considerations of how their envisioned government would affect future society and vice versa.