Irda Ranger said:
The main problem with summarizing the "core splurge" is that it has changed too often. There have been too many "Krynn Shaking Events" (IMO) and the setting is kind of all over the place. The era you choose to play in (Age of Might, Age of Despair, War of the Lance, Age of Hope, 5th Age, etc.) will strongly influence the feel of the setting.
Below is how I would sum up the setting as originally presented in the War of the Lance Era, which is when the original modules were released. I haven't really kept up with the setting since the 5th Age came out though, as recent changes were not to my taste. Cam Banks can probably answer your question for recent developments.
I don't think it's fair to characterize Dragonlance as being constantly hit by Krynn Shattering Events. In terms of the history of the game line itself, there's only been one major world-changing event: the Chaos War, described in the Dragons of a Summer Flame novel. At the end of that, the gods are gone and magic is gone and everything looks bleak. The Age of Mortals starts, with new magic being discovered, although eventually the gods return in the War of Souls trilogy and we learn that Krynn was actually stolen by Takhisis, the Queen of Darkness, and the gods had been looking for it since. The Cataclysm, which took place 350 years before the War of the Lance, had already happened in the game's background story, so it's part of the setting from Day One.
There are two primary eras of play, and those are the original "classic" era (the War of the Lance) and the current era (the Age of Mortals, post-WoS). Like any campaign world, you can play in other time periods as well, such as the Age of Might, which covers a period thousand years of time before the Cataclysm, when the Knights grew fairly strong, the dragons were all banished, and the Empire of Istar starts to gain power. We cover some of these other time periods to a limited degree in the game products, but they're not actually set aside as fully-featured eras. It's a lot like Star Wars being set either in the "classic" movie period or the more recent novel periods with the next generation of Jedi, etc.
While there's a metaplot going on, I think from the very beginning the setting has been open to players and DMs taking the story their own way. Our recent revision of the classic modules (as Dragons of Autumn, Dragons of Winter, and Dragons of Spring) was designed to be played with original characters who fit archetypes, rather than with pregenerated characters from the novels. Our experience has been that players would like their characters to be the stars of the story, and so we've taken steps to ensure that this is the case.
I invite folks to check out
www.dragonlance.com,
www.dragonlanceforums.com, and
www.dlnexus.com for more insight, official web supplements, fan-created rules, message boards, community, and direct conversations with DL designers and authors. Margaret still maintains a strong presence on our forums, and loves to interact with fans.
Cheers,
Cam