1 Subjects: “...Cities and towns / History...”

2 Subjects: “...Social structure / Colombia / History...”

3 Subjects: “...Discoveries in geography / History / To 1500...”

4 Subjects: “...Violence / History...”

5 Subjects: “...Charisma (Personality trait) / Political aspects / United States / History / 19th century...”

6 Subjects: “...Protest movements / England / History / To 1500...”

7 Subjects: “...Science fiction / History and criticism...”

8 Subjects: “...Political persecution / Developing countries / History / 20th century...”

9 Subjects: “...War and society / History / 20th century...”

10 Subjects: “...Science / United States / History...”

11 Subjects: “...Power (Social sciences) / History / To 1500...”

12 Subjects: “...Art / Netherlands / History / 17th century...”

13 “...Burundi / History...”

14 “...Egypt / History / Protests, 2011-...”