Theoretically, even one gene-drive–engineered organism could crash an entire population.

That possibility terrified some people when they learned about the yellow fruit fly experiment. If a gene-drive–containing organism were to escape from the lab and start breeding with its wild counterparts, it could irrevocably alter the wild population. Maybe even wipe it out.
https://www.sciencenews.org/article/...ad-their-wings

Whoah.