The eight basic features of a civilization are large population centers, a central administrative body, complex religion, job specialization, social class structures, forms of art and architecture, organized public works, and a system of writing. So basically if a society works its way up and has this
There was irragation systems allowing crops to grow. The lot amount of crops meant that farmers didnt really need to crop due to all the food they had. Specialized jobs came along to emerge the civilation.
