31st century BC

(32nd century BC - 31st century BC - 30th century BC - other centuries)

(5th millennium BC - 4th millennium BC - 3rd millennium BC)

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Events:

• 3000 BC - Menes unifies UpperLower Egypt, andnew capitalerected at Memphis.

Significant persons:

• Ur-nina first kingLagashMesopotamia

Inventions, Discoveries, Introductions:

• Chinese ideograms
• Drainagesewage systemIndia
• Dams, canals, stone sculptures using inclined planeleverSumeria
• PyramidsAncient Egypt
• Copper wasuse, both as toolsweapons.
• Crude writing existedEgypt,cuneiform writing was inventedMesopotamia.