Final answer:
Early modern Southeast Asian societies had a less stratified social structure than India and China. The arrival of new religions gave rise to priestly and kingly classes, but the emphasis on individual family was a commonality in these societies.
Step-by-step explanation:
Early modern Southeast Asian societies were structured in a less stratified manner compared to India and China. In these societies, social hierarchies and classes started to form with the arrival of new religions such as Buddhism and Hinduism, which led to the emergence of priestly and kingly classes. However, the social structure was still less stratified compared to other regions, and the importance of the individual family was emphasized over extended families.