Conversation so far:
What was the Olmec people's ethnicity?
While the actual ethno-linguistic affiliation of the Olmec remains unknown, various hypotheses have been put forward.
What was the Olmec people's language?
In 1976, linguists Lyle Campbell and Terrence Kaufman proposed that the Olmec spoke a language ancestral to Mixe–Zoquean.
What else do we know about the Olmec's language besides that it is a language ancestral to Mixe-Zoquean.
What else did the Olmec do as a society?
Is there anything else interesting about the Olmec?
When was the Olmec period?
Olmec civilization, located in ancient Mexico, prospered in Pre-Classical Mesoamerica from c. 1200 BCE to c. 400 BCE.

Question: What happened in this time period?
Self-contained rewrite: What happened inthe Olmec period?