Find out new things you never knew
Some of the requirements to have a civilization is you have to do what the leader tells you, you also have to give your harvest to the gods like paying rent, if you don't you will work (become a slave) until you pay it off.
Hammrabi's laws that I like
2.) if a man has stolen goods from a temple or house, he shall be put to death; and he that has received the stolen property from him shall be put to death as well.
3.) if a man has stolen a child, he shall be put to death.
4.) if she has not been discreet, has gone out, ruined her house, belittled her husband, she shall be drowned.
5.) if son has struck his father his hands shall be cut off.
This is a timeline showing what happened
Farming and agriculture
Agriculture is useful to, if you know it you can make clothing from wool and farm better.