The most important features of early civilizations were:
1.  Settlement in definite territories and enough of food, clothing and shelter.
2.  People living in towns and cities.
3.  The development of various crafts, trade and commerce.
4.  The skill gained to express one's thought in writing.
5. A large boat or a ship meant for journeys along the rivers and seas.
6.  Evolution of 'rules' and some methods of government.
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