ants of India were geographically close to the original seat of the Indo-European Family. Hence the home was sought in the elevated plateau to the north. To-day it is thought that central or southeastern Europe is much more likely to have been the cradle of the Indo-European parent-speech, though anything like a logical demonstration of so difficult a problem can hardly be expected.
As to the size and extent of the original tribe whence the Indo-European languages have sprung, we can only speculate. It probably was not large, and very likely formed a compact racial and linguistic unit for centuries, possibly for thousands of years.
The time at which Indo-European unity ceased and the various individual languages began their separate existence, is likewise shrouded in obscurity. When we consider that the separate existence of the Sanskrit may antedate 2500 B.C., it may well be believed that people speaking the Indo-European parent-speech belonged to a period as far back as 5000 B.C., or possibly earlier.