"Nested Regulatory Mechanisms" Fig 5.2, p 256

• Language (100,000 BP?)

• Oral traditions (50,000 BP?) (stories, legends)

• Written records (5,000 BP)

• Legal systems (4,000 BP) (civil, criminal, economic)

• Schools (2,000 BP)

• Libraries (2,000 BP)

• Universities and research institutions (1,000 BP)

• Scientific and professional societies (400 BP)