system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: if Cheetah extinction is considered inevitable due to lack of genetic diversity, then wouldn't any animal who reached low populations be doomed for extinction for same reason?
gpt
Yes,  there is a minimum population below which it is impossible to recover without external aid. 

On a related note,  there is a minimum birth rate for a country.  Below that rate the country's population will collapse.