When exactly the south indian dravidian languages originated from Tamil?
I read through history that Tamil is the oldest language in indian as well as the world history.The indus and harappa valley civilizations scripts and lithographic inscriptions are similar to the sangam old tamil scripts.Undoubtedly its the oldest language henceforth it was made as the first classical language in india.While going through it , it was unclear when the other dravidian languages like malyalam,Telugu and kannada originated from Tamil.