What is the unmentionable times in Anthem?

Related questions

1. Why does equality refer to himself as we?
2. What does the tunnel symbolize in Anthem?
3. How does equality 7 2521 view nature in this chapter?
4. Why is equality 7 2521 a street sweeper?
5. What is the purpose of Anthem?
6. What are the unmentionable times in Anthem?
7. What does the golden one symbolize in Anthem?
8. Is there a sequel to Anthem?
9. Why is equality happy as a street sweeper?
10. What do the names in Anthem represent?

Tags

1. #world
2. #realize
3. #before
4. #modern
5. #anthem
6. #twenty
7. #centuries
8. #twentieth
9. #occurred
10. #readers
11. #great
12. #refer
13. #unmentionable
14. #first
15. #rebirth
16. #particularly
17. #times