50
modern
× 3 |
8
civil-rights
|
4
united-states
× 4 |
0
academics
|
42
political-history
× 2 |
8
20th-century
|
4
military
× 2 |
0
19th-century
|
42
international-relations
× 2 |
8
place-names
|
3
tradition
|
0
18th-century
|
40
orthodoxism
|
8
world-war-two
|
3
cultural-history
|
0
crime
|
13
government
× 2 |
8
britain
|
0
law
× 2 |
0
slavery
|
12
language
× 3 |
8
agriculture
|
0
us-constitution
× 2 |
0
justice
|
11
religion
× 2 |
8
animals
|
0
education
|
0
science
|
8
ancient-history
× 2 |
7
assimilation
|
0
labour-history
|
0
engineering
|
8
islam
|
5
election
|
0
colonial-america
|
0
secrecy
|
8
north-america
|
5
travel
|
0
employment
|
0
gold
|
8
race
|
5
immigration
|
0
economy
|
Robert Columbia
