Wodan said:
I've been wondering whether it would be better to split the current system... to have a "political border" along with a "cultural border". That would solve the problem of not being able to work any tiles.
Totally agree. In fact if I was looking forward to Civ 5, one of the things I'd like to see is a much more realistic model of culture and borders. The way it works in Civ 4 is probably not bad for ancient times, but doesn't remotely reflect real life in the modern world, in which borders are (mostly) agreed internationally and people do not for the most part choose to change their national affiliation because some country built a theatre

. A well-designed more realistic model would be a very nice new element to the game - eg.
* Oppressing people could turn them against you
* Adopting multiculturalism could inspire people in your borders to stay loyal to you even though their real nationality lies elsewhere
* If you know people in some other country don't really want to be in that country, you could smuggle arms in to help them revolt
* United Nations could be used to agree and enforce international borders.
etc.
Not really sure (yet) how those could in the game work but just throwing out idea.
But I guess this is really going off topic for this thread so I'll shut up now
