eh, but copyright as it stands now, decreases the availability of literature (I mean, aside from how it encourages creating it, which is super important, of course.) so those things couldn't have been reasons for creating copyright law as it stands in the US.
(an interesting side effect, as a person willing to spend money on books? It's a lot easier to get a good e-book of something still under copyright than of something out of copyright. Like, I'm super happy to pay $20 or whatever for something better-than-gutenberg and that's really a lot of effort. I don't really know how they do it, 'cause half the for pay out of copyright books for kindle on amazon are worse than just downloading the .mobi from gutenberg. For anything public domain, you have to wade through a sea of badly formatted garbage, even if you are largely price insensitive; price isn't a reasonable signal either way. On the other hand, if it is in public domain, you almost certainly will be able to find an e-book of it, and the quality you get just hitting gutenberg really isn't that bad, while if it is in copyright, if it is an obscure book, your only real option is paper.)
I wonder how much of my problem with finding well formated kindle books is my own lack of familiarity with the search tools and publishing houses? or with amazon's lack of features (like, some sort of rating for the publisher would be useful here. Right now, amazon makes it really hard with their combining of reviews for different formats/editions/publishers. Like sometimes the kindle version and paper version (for out of copyright books) will be different publishers, and amazon just glomps the reviews together, making it really quite difficult.