tech tree

[MeaCulpa]

Currently German computer magazine "PC Games" has a reportage on DVD about Civ4 (from which I borrowed those 2 screenshots).

While on the 1st one, you can hardly read anything specific (you can count the total number of techs however), #2 is much more detailed and gives you a clue about the tech interaction in the mid-game (there is a continous zoom from #1 to #2).

http://www.imagedump.com/index.cgi?pick=get&tp=307625

http://www.imagedump.com/index.cgi?pick=get&tp=307629

I added 1 more: http://www.imagedump.com/index.cgi?pick=get&tp=307635

It shows details about "philosophy".

"I have gained this by philosophy: that I do without being commanded what others do only from fear of the law." --- Aristotle

Enables: pacifism (a civic trait I suppose)
First to discover founds: T????????? (could it be Taoism ?)
Leads to: nationalism, liberalism
Allows: ???? (can anyone identify this building ? Taoist cathedral ?)

[Adm.Naismith]

Great use of low technology way, to mark relations between discoveries...

Of course the snapshot has been taken at Firaxis before they discovered flow chart software and computer.

[Wise Ass]

It reminds me of that comercial for the visa business card, they had a bunch of strings connecting different things and they called it the matrix.

"The matrix isn't perfect..."

[Urban Ranger]

Originally posted by Proteus_MST
Sailing and (or?) Iron Working leading to the invention of the Compass very early in the tree.
O.K.

But magnetism not getting detected before the invention of electricity (and/or biology) much later within the tree????

You don't need magnetism for compass. Just like you don't need chemistry to get gunpowder.