Final answer:
Agrarian societies have the most social stratification due to the stability and surplus provided by agriculture, leading to the development of distinct social classes and limited social mobility.
Step-by-step explanation:
Keeping the Kuznets curve in mind, agrarian societies typically exhibit the most social stratification. This is due to the development of agriculture which allowed for the accumulation of surplus resources and permanent settlements. As societies become more technologically advanced with agriculture, specialization of labor occurs along with the development of social classes. The stability provided by agriculture and the surplus of food lead to the emergence of different social classes, with rulers and religious leaders typically occupying the top echelons, while those producing food and labor remained at the bottom. Industrial societies, while also stratified, tend to have mechanisms for social mobility that can mitigate the extent of social stratification as compared to agrarian societies.