Unfotunatly the tech tree is a little bit longer.
Modern Medicine has two prerequisites. The following lines are taken from the Advance.txt, you see the relevant entry for Modern Medicine
Code:
|
ADVANCE_MEDICINE {
Prerequisites ADVANCE_CORPORATION
Prerequisites ADVANCE_PHARMACEUTICALS
Cost 30250
Icon ICON_ADVANCE_MEDICINE
Branch 0
Age AGE_FOUR
} |
So you need for Modern Medicine a second advance and the same thing is true for most of the other advances. And also if it would be possible More modern advances would be to expensive for acient civs.
-Martin