If it isn't on the Internet, it isn't worth knowing. But, there is quite a bit that isn't there. The main reason, of course, is economic. It is expensive to convert text documents into Internet language, and if there is no way to make a profit from the demand, there won't be a supply. Just think of the e-commerce opportunities.
History has no value on the Internet.
At least television airs old movies and series, which is how most of us who grew up in the 1950s, 60s and 70s learned what little history we still remember. Peace and Love, not War Try researching history on the Internet and you will find that the older the topic, the less information is there. Bill Clinton has more Web sites than Abraham Lincoln. Stephen King tromps William Faulkner, Herman Melville and Nathaniel Hawthorne. If you want history, I guess you'll have to resort to an actual book.