1.1 Social group types

1.2 Identity formation

1.3 Social norms

1.4 Group conflict

2.2 Opportunity cost

2.3 Resource allocation

2.4 Economic systems

2.5 Specialisation

2.6 Productivity

3.1 Political drivers

3.2 Military drivers

3.3 Economic drivers

3.4 Ideological drivers

4.1 Imperial governance

4.2 Administrative systems

4.3 Imperial economies

4.4 Social hierarchies

4.5 Expansion strategies

5.1 Internal instability

5.2 External pressures

5.3 Economic decline

5.4 Independence movements

6.1 Population growth

6.2 Demographic transition

6.3 Migration patterns

6.4 Urbanisation

6.5 Social impacts

6.6 Economic impacts

7.1 Renewable resources

7.2 Non-renewable resources

7.3 Risk and resilience

7.4 Environmental governance

8.1 Land-use change

8.2 Resource depletion

8.3 Pollution

8.4 Conservation strategies

9.1 Urban structure

9.2 Environmental challenges

9.3 Social challenges

9.4 Sustainable planning

10.1 Global trade flows

10.2 Trade institutions

10.3 Fair trade

10.4 Economic interdependence

11.1 Development indicators

11.2 Human wellbeing

11.3 Development barriers

11.4 Development strategies

12.1 Cultural worldviews

12.2 Scientific worldviews

12.3 Political worldviews