| REQUIRES: |
SCIENCE: |
|
ALLOWS: |
| flight & electricity |
advanced flight |
|
rocketry |
|
alphabet |
* |
code of laws & mapmaking & mathematics & writing |
| mysticism & mathematics |
astronomy |
* |
theory of gravity & navigation |
| theory of gravity & physics |
atomic theory |
|
nuclear fission |
| combustion & steel |
automobile |
+ |
mass production |
| trade & the republic |
banking |
* |
industrialization & the corporation & the republic |
| construction & iron working |
bridge building |
* |
railroad |
|
bronze working |
* |
currency & iron working |
|
ceremonial burial |
* |
monarchy & mysticism |
| university & medicine |
chemistry |
+ |
explosives & refining |
| horseback riding & feudalism |
chivalry |
|
|
| alphabet |
code of laws |
* |
literacy & monarchy & the republic & trade |
| refining & explosives |
combustion |
+ |
automobile & flight |
| philosophy & industrialization |
communism |
|
labor union |
| mathematics & electronics |
computers |
|
robotics & space flight |
| the republic & explosives |
conscription |
|
the republic |
| masonry & currency | construction |
* | engineering & bridge building |
|
bronze working |
currency |
* |
construction & trade |
| philosophy & literacy |
democracy |
|
recycling |
| metallurgy & magnetism |
electricity |
|
advanced flight & electronics |
| engineering & electricity |
electronics |
|
computers & nuclear power & rocketry |
| the wheel & construction |
engineering |
* |
electronics & invention |
| gunpowder & chemistry |
explosives |
+ |
combustion & conscription |
| masonry & monarchy |
feudalism |
|
chivalry |
| combustion & physics |
flight |
|
advanced flight |
| nuclear power & superconductor |
fusion power |
|
|
| medicine & the corporation |
genetic engineering |
|
|
| invention & iron working |
gunpowder |
+ |
explosives & metallurgy |
| horseback riding |
chivalry |
|
|
| railroad & banking |
industrialization |
+ |
communism & steel & the corporation |
| engineering & literacy |
invention |
* |
gunpowder & steam engine |
| bronze working |
ironworking |
* |
bridge building & gunpowder |
| mass production & communism |
labor union |
|
|
| writing & code of laws |
literacy |
* |
invention & democracy & philosophy & the republic |
| navigation & physics |
magnetism |
|
electricity |
| alphabet |
map making |
* |
navigation |
|
masonry |
* |
mathematics & construction & feudalism |
| automobile & the corporation |
mass production |
|
labor union & nuclear fission & recycling & superconductor |
| alphabet & masonry |
mathematics |
* |
astronomy & computers & physics & university |
| philosophy & trade |
medicine |
+ |
chemistry & genetic engineering |
| gunpowder & university |
metallurgy |
+ |
electricity & steel |
| ceremonial burial & code of laws |
monarchy |
|
feudalism |
| ceremonial burial |
mysticism |
* |
astronomy & philosophy |
| mapmaking & astronomy |
navigation |
* |
magnetism & physics |
| atomic theory & mass production |
nuclear fission |
|
nuclear power |
| electronics & nuclear fission |
nuclear power |
|
fusion power |
| mysticism & literacy |
philosophy |
+ |
communism & democracy & medicine & religion & university |
| mathematics & navigation |
physics |
* |
atomic theory & flight & magnetism & steam engine |
| refining & spaceflight |
plastics |
|
robotics & superconductor |
|
pottery |
|
|
| steam engine & bridge building |
railroad |
* |
industrialization |
| mass production & democracy |
recycling |
|
|
| chemistry & the corporation |
refining |
+ |
combustion & plastics |
| philosophy & writing |
religion |
|
plastics & computers robotics |
| advanced flight & electronics |
rocketry |
|
space flight |
| computers & rocketry |
space flight |
|
plastics |
| physics & invention |
steam engine |
* |
railroad |
| metallurgy & industrialization |
steel |
+ |
automobile |
| plastics & massproduction |
superconductor |
|
fusion power |
| banking & industrialization |
the corporation |
+ |
genetic engineering & mass production & refining |
| code of laws & literacy |
the republic |
+ |
banking & conscription |
|
the wheel |
* |
engineering |
| astronomy & university |
theory of gravity |
|
atomic theory |
| currency & code of laws |
trade |
+ |
banking & medicine |
| mathematics & philosophy |
university |
+ |
chemistry & metallurgy & theory of gravity |
| alphabet |
writing |
* |
literacy & religion |