How many Indian castes?

India has thousands of castes, with estimates ranging from around 3,000 to over 4,000 distinct groups. The Caste System is complex and varies across regions, communities, and social practices. Major castes are often categorized into four primary groups: Brahmins, Kshatriyas, Vaishyas, and Shudras, alongside numerous sub-castes. Additionally, there are Scheduled Castes and Scheduled Tribes recognized by the Indian government for affirmative action purposes.