31
magic
× 3 |
7
communication
|
4
earth-like
× 2 |
2
cities
|
28
modern-age
× 2 |
7
mathematics
|
4
weapons
× 2 |
2
computers
|
26
scientific-development
|
6
reality-check
× 4 |
4
food
|
1
law
× 2 |
21
technological-development
× 3 |
6
religion
× 3 |
4
gender
|
1
android
|
20
medieval
× 2 |
6
government
× 2 |
4
civilization
|
1
artificial-intelligence
|
16
alternate-history
× 2 |
6
biology
× 2 |
4
environment
|
1
economy
|
16
medieval-europe
|
6
evolution
× 2 |
4
near-future
|
0
energy
|
11
culture
× 4 |
6
brain
|
3
politics
|
0
alternate-worlds
|
10
technology
× 4 |
6
immortality
|
3
warfare
|
0
ancient-history
|
10
science-based
× 3 |
6
methuselah
|
3
super-powers
|
0
radioactivity
|
9
society
× 5 |
5
intelligence
|
2
spaceships
|
0
secret-society
|
8
space-travel
× 3 |
5
humans
|
2
transportation
|
0
time
|
7
time-travel
× 2 |
5
fauna
|
2
privacy
|
David Mulder
