Guns, Germs & Steel

Eurasia

Fertile Crescent

China

England

Plant domestication

8500 b.c.

by 7500 b.c.

3500 b.c.

Animal domestication

8000 b.c.

by 7500 b.c.

3500 b.c.

Pottery

7000 b.c.

by 7500 b.c.

3500 b.c.

Villages

9000 b.c.

by 7500 b.c.

3000 b.c.

Chiefdoms

5500 b.c.

4000 b.c.

2500 b.c.

Widespread metal tools

4000 b.c.

2000 b.c.

2000 b.c.

or artifacts (copper

and/or bronze)

States

3700 b.c.

2000 b.c.

500 A.D.

Writing

3200 b.c.