Most books from the past were dreadful but there are a couple selection mechanisms at play. For one, we only promote the best ones. The further back it goes the

Most books from the past were dreadful but there are a couple selection mechanisms at play. For one, we only promote the best ones. The further back it goes the more picky we get. Second, it was a lot harder to publish in the past, so those who did it had more reason to.