The Known World later became known as Mystara, and it's Mystara that's generally counted as the first official D&D campaign setting.
Drama again this week with attack lawyers dispatched against Wizards of the Coast, hassles over Kickstarters at Dragonmeet and confusion and concern over the direction Kickstarter itself might be taking.
Designers & Dragons: The '70s is a comprehensive picture of the beginnings of the RPG industry.
Another busy RPG news week, but don't worry as Routinely Itemised as everything divided into quick to read bullet-point summary lists.
The Bundle of Holding is repeating a successful 2015 sale and offering up a whole bunch of PDF books about the RPG industry.