Conversation so far:
When was the disbandment of the Mothers of Invention?
In late 1969, Frank Zappa broke up the band.
Why did the band the Mothers of Invention break up?
Frank Zappa often cited the financial strain as the main reason, but also commented on the band members' lack of sufficient effort.

Question: What else is significant about this time?
Self-contained rewrite: What else was significant about the time period when the Mothers of Invention disbanded?