Remember this – Without Agriculture there is no Culture –

Before people were able to grow and sustain their own food sources they were Nomads and had limited time to do anything such as develop customs, develop writing systems, read, create religion (i’m not saying that these things DIDN’T exist, but they weren’t as well developed). When they didn’t have to spend all their time looking for food, they were able to do things like develop math, build structures, create codes of law and so on. What made all of this possible?

The ability to use water (Geography), develop trade for good within their own civ’s and others (Economy) and the creation of technology (remember, a metal tool was a teachnological advancement to someone using stone.)

Most of these Civ’s survived in some way or form but were ended by groups of people that had superior technology to their own. (Especially Egypt who was beaten because of different types of metal, Central America – the introduction of the European with a gun, China and India because of warring technology.)

Hope this helps.