Realms Lore - History of the Last March of the Giants
Unable to contain his curiosity, the titan king ran off after the bouncing sphere and his devoted followers dutifully followed his tracks. The meteorite rolled on and on until it reached the Great Sea and vanished into the depths. The monarch dove into the sea, and, lemminglike, the entire titan race dove in after him, never to be seen again.
Ashamed at the destruction they had wrought, the powers vowed to keep both curiosity and loyalty firmly in check to avoid such disasters in the future. They have done so to this day, preventing both new ideas from being pursued with any speed and the intelligent races of Toril from ever fully cooperating.