Evolutionary Sequence
1 = Inca
2 = Maya
3 = Central Mexico
4 = Egypt
5 = Shang
6 = West Africa
7 = Mesopotamia
8 = Indus

Writing and Records
1 = None
2 = Mnemonic or nonwritten records
3 = True writing

Fixity of Residence
1 = Nomatic
2 = Seminomadic
3 = Sedentary

Agriculture
1 = None
2 = 10% or more, but secondary
3 = Primary

Urbanization
1 = Largest settlement < 100 persons
2 = Largest settlement 100-399 persons
3 = Largest settlement 400+ persons

Technological Specialization
1 = None
2 = Ceramics
3 = Metalwork (alloys, forging, casting)

Land Transport
1 = Human only
2 = Pack or draft animals
3 = Vehicles

1 = None
2 = Domestically usable articles
3 = Currency

Density of Population
1 = < 1 person/square mile
2 = 1-25 persons/square mile
3 = 26+ persons/square mile

Political Integration
1 = Autonomous local communities
2 = 1 or 2 levels above community
3 = 3 or more levels above community

Social Stratification
1 = Egalitarian
2 = 2 social classes
3 = 3 or more social classes or castes