Subject
History
8
Social conditions
Human ecology
6
Social aspects
5
Black Death
4
Environmental conditions
3
Social change
3
Antiquities
2
Climatic changes
2
Crises
2
Diseases
2
Economic aspects
2
Economic conditions
2
Environmental archaeology
2
Environmental aspects
2
Mayas
2
Social archaeology
2
War and society
2
Animals
1
Borderlands
1
Cities and towns, Ancient
1
City and town life
1
Effect of human beings on
1
Forests and forestry
1
Four elements (Philosophy)
1
Human geography
1
Human-animal relationships
1
Middle Ages
1
Nature
1
Relations
1
Urban ecology (Sociology)
1