What if India and Pakistan had not been partitioned in 1947—how would South Asia be different today?

Would the region have remained a single unified nation under one central government orr would o ınternal divisions—based on religious, cultural, and linguistic differences—have eventually led to alternative forms of federalism or autonomy? How might the relationship between Hindus, Muslims, Sikhs, and other religious groups have evolved without the traumatic impact of partition? What would the political and economic landscape look like without the creation of two separate nations with distinct identities?