Guns, Germs, and Steel Summary

Events

7,000,000 b.c.
7,000,000 b.c. - 1,700,000 b.c.
7,000,000 B.C. - Present
4,000,000 b.c.
1,700,000 b.c. - 500,000 b.c.
11,000 b.c.