Conversation so far:
Was there migration in the later vedic period
The Vedas were composed by speakers of an Old Indo-Aryan language who had migrated into the northwestern regions of the Indian subcontinent early in this period.
What kind of things did the Vedic culture grow?
The Indo-Aryans cultivated wheat, rice and barley in the Vedic period.

Question: how did the society change
Self-contained rewrite: How did the Vedic society change by the end of the Vedic period?