Sullla: I've just won my first cultural victory on chieftain therefore it is possible and I can tell ya it's damn easy.
Played as the Egyptians (religious, industrious) and was a breeze. Expanded like crazy (i had the first second city built 20 turns ahead of the others) and started building ALL Wonders that I could lay my hands on.
And I did build all of the Wonders except the Great Wall which was snapped up by the Aztecs (which building that Wonder put them an era behind

) and eventually pushed my borders and build up my military force in case some AI tries to be funny.
Years passed and still no one declares war, so I just sit tight, and keep expanding my cultural borders eating around 7 cities in the process. Won the game in 1900 AD with not one war at all!

(Yeah I know kinda boring with no action

) So that's my story on cultural victory. Long, boring, yawn yawn but possible and much faster than diplomatic victory (I has only in the early Modern Ages)
