Why would you run out of things to build? You need units to defend and secure your borders as well as take on the barbarians and take barb cities. All this along with trying to protect yourself from an overzealous neighbor. When it takes 20 game turns to build a hunters camp or 14 game turns for Fishing Docks that's a lot of game years. And those are the short build time bldgs.
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Well, this might sound strange at first, but years don't really matter. Think about it - the current date has absolutely no gameplay effect. One turn is 20 years at the start of the game and one season in late XX century. Yet this fact by itself has no impact on the gameplay.
Also, from gameplay PoV, current building costs are balanced pretty well with unit costs - if a building were cheaper than a unit, we'd have all cities fully improved in no time. We don't want this - a player has to decide to either invest heavily in building up their cities or devoting these precious resources to other tasks, like border security, expansion etc. If you can comfortably do everything in short time, the value of tactical decision-making is greatly diminished.
Because it's the only one listed in game setup to build.
Are we supposed to import others?
I'm not really following you here. Are you claiming that you can't select any map scripts other than archipelago? All the stock map scripts (fractal, continents, etc) are supposed to work, and you can download many custom good ones from CFC as well.
Sorry Walter but Wiki is Not an Official Encyclopedia or Accurate data base for that matter. And not every Jungle is doom and disease either. So we will have to agree to disagree.

It is, after all, your Mod and you can view Jungles however you want to simulate the gameplay you wish to provide.
Well, as others pointed out,
1) I was quoting a sourced reference from a book
2) Wikipedia is a source - it is someone's opinion, and not 100% accurate, but by that mark everything ever published is someone's opinion, and nothing is ever 100% accurate.
The basic point that I was making is that jungle can't support
civilization. All civilizations in jungle-heavy areas that I can think of were actually existing on territories claimed from jungle and turned into agricultural lands.
No I wanted to say that there is no American civilization in your map

So if I want to play Earth map as American civilization in your mod i dont have a chance because native scenario doesnot works with your mod and your maps dont have american civilization.

I just want to play earth map with american civ on your mod. Thats the point. So im very sad because as I sad this is the best mod in Civ4 i think.
Yeah, sorry about that. That's right, no USA on either of the current maps. I understand that about a third of our players are American and it might be somewhat inconsiderate of us...
You could always use WB to move somebody over to America.... maybe sweden since they share the initial flavor units
More than that, after that one can manually edit a WB save to turn them into the needed civ. Actually...