Not naturally.

All around her, Jedrik sensed Chu with its indigestible polarities.  They had only two species:  Human and Gowachin.  Why two? Were there no other species in this universe?  Subtle hints in some of Dosadi's artifacts suggested an evolution for appendages other than the flexible fingers of Gowachin and Human.

Why only one city on all of Dosadi?

Dogma failed to answer.

The Rim hordes huddled close, always seeking a way into Chu's insulated purity.  But they had a whole planet behind them.  Granted it was a poisonous planet, but it had other rivers, other places of potential sanctuary.  The survival of both species argued for the building of more sanctuaries, many more than that pitiful hole which Gar and Tria thought they masterminded.  No . . . Chu stood alone - almost twenty kilometers wide and forty long, built on hills and silted islands where the river slowed in its deep canyon.  At last count, some eighty-nine million people lived here and three times that number eked a short life on the Rim - pressing, always pressing for a place in the poison-free city.

Give us your precious bodies, you stupid Rimmers!

They heard the message, knew its import and defied it.  What had the people of Dosadi done to be imprisoned here?  What had their ancestors done?  It was right to build a religion upon hate for such ancestors . . . provided such ancestors were guilty.

Jedrik leaned toward the window, peered upward at the God Wall, that milky translucence which imprisoned Dosadi, yet through which those such as this Jorj X. McKie could come at will.  She hungered to see McKie in person, to confirm that he had not been contaminated as Havvy had been contaminated.