I made a prototype for a neolithic revolution simulator, with city-building elements, during Ludum Dare 36 (Ancient Technology).
The Neolithic Revolution or Neolithic Demographic Transition, sometimes called the Agricultural Revolution, was the wide-scale transition of many human cultures from a lifestyle of hunting and gathering to one of agriculture and settlement, allowing the ability to handle an increasingly larger population
I used Grids Pro to quickly get a hex-based map and coordinates system up and running in Unity.