http://press-pubs.uchicago.edu/founders/tocs/toc.html
The Founders' Constitution.

It is a good read, for Libertarians.
For those who think that freedom is anachronistic, less so.

And it was our newbie poster who pointed me to this gem.

It is seldom that liberty of any kind is lost all at once. Slavery has so frightful an aspect to men accustomed to freedom that it must steal in upon them by degrees and must disguise itself in a thousand shapes in order to be received.
David Hume, 1742

http://press-pubs.uchicago.edu/founders/documents/amendI_speechs2.html