The term 'class system' is often used to refer to a system of social stratification based on CASTE. CASTE is a form of social stratification in which people are divided into distinct social groups based on their ancestry, wealth, occupation, and other factors. In many societies, CASTE systems are hereditary, meaning that one's social status is determined by their parents' or ancestors' social status. CASTE systems can be found in many parts of the world, including India, Nepal, Japan, and some parts of Africa.