Type E • Earth Body The center of the [[Greyspace|Greyhawk]] system, Oerth is the most diversely and heavily populated planet in the system, with every sentient race in the shell being represented to one degree or another. Native mapmakers of the Free City of Greyhawk place their land literally at the center of the universe, with all of the Flanaess and Oerth rotating about them, and the planets and sun passing across the sky that surrounds them. Te centralized location of Oerth accounts for the superior attitude of its people , but there is another factor. Oerth is a very competitive world with very powerful mortal entities, at times contending with te gods themselves and besting them. A long string of such incidents increases the self-confidence (and ego) of the natives of Oerth , in particular those in the "adventuring" areas-wizards, warriors , priests, and rogues. This self-centered nature tends to make Oerth groundlings insular. Th e natives of Oerth have a passing interest in spelljamming and spelljamming technology , though they put it in the same general area as extradimensional travel. It matters little if a traveler is from the next world or another plane; he is an outsider and is treated as such. Trad e is erratic and best confined to singular items that individuals find useful-artifacts, specialized magical items, and relics. Oerth itself , with its ancient civilizations, has a bumper crop of such items, and of ten is all too willing to export such dangerous items elsewhere. Smoke powder does not function on Oerth, though it does in wildspace and on other planets in the system. Whether this is due to the chemical makeup of the Oerth atmosphere or some interference by gods who already fear the growing power of mortals is unknown