At the peak of the world existence long ago was all the races living and fighting amongst themselves. There were your sea creatures, forest dwellers, human, and the flier's in the sky. All having there own capital amongst their own through the lands. Sea creatures being your typical sea life fish, crabs, sharks, and so on. Forest dwellers being wolves, bears, monkeys, frogs, and so on. Fliers in the sky being dragons. The most powerful of all the races being the dragons.
After awhile some grew tired of not having the entire world to themselves when they wielded so much power. So few began massing many to their cause. While other dragons defended the land people. Surely a war soon broke out. The races on land became scattered from years of bloodshed and war from the dragons that saught to enslave them. From the battle the dragons became noticeable of their deeds through the color of their scales. Red dragons being drenched in the blood of their many victims. Black dragons from being scorched by other dragons defending the lands. The most dangerous dragon being the white dragons whom secluded themselves deep within them earth being the starters of the conflict and tring to stay out of deaths reach. The lack of sunlight has turned them white. They are the leaders of the red dragon armies tring to enslave the world.
Many years of fighting took place. Eventually through the combined efforts of the land people and the black dragons they derailed the march of enslavement. A time of peace came over again into the scorched and bloodied lands that they called home. Dragons soon found themselves able to take human form through the magics that exist in the world. Some would be humans with wings on their backs some would look just like an ordinary human. Times were once again peaceful.

Good stuff, I enjoy your ideas on BoF.
TwiGGy11:13 PM CST