Conversation so far:
how did the location of bodies of water affect settlement in china
The soil around the Yangtze and Huang He Rivers was rich and good for farming due to the silt that was deposited during the spring floods.
and in egypt how did the location of bodies of water effect settlement
The most important result of this expansion of the Sahara for human civilization was that it pushed humans closer to the Nile River in search of reliable water sources.
when did early human civilizations develop agriculture
Researchers from Tel Aviv University, Harvard University, Bar-Ilan University, and the University of Haifa offer the first evidence that trial plant cultivation began far earlier -- some 23,000 years ago.

Question: what about cities
Self-contained rewrite: what about cities when was the first built