I wouldn't use "she" as a collective noun unless I also used a more neutral "humankind" or something. But really I prefer to use "they".
I suppose the time at which the US constitution was written was much more sexist than it is now, but I always thought it read fairly neutrally.
In any case, it's mostly a matter of having caution when reading these works, since their importance might cloud our judgment.
[1] http://www.nationalreview.com/corner/256401/does-constitutio...
http://www.etymonline.com/index.php?term=man&allowed_in_fram...
Edit: New to GitHub I guess, but that name is well known on other sites.
That account appears to have only one comment ever.
https://reddit.com/r/RedditArmie/comments/2g29ft/the_youtube...