In the aftermath of Judgment Day, we fled to the Exclusion Zone and sought refuge underground. This is what is left of our fallen civilization.

Approximately 5:1 – research on the positive to negative interactions ratio

https://www.gottman.com/blog/the-magic-relationship-ratio-according-science/

https://www.gottman.com/blog/the-positive-perspective-more-on-the-51-ratio/