I know it's optional, staying in the gene pool is optional. But in the long term, there looks like there will always be someone there to take these jobs. The on

I know it's optional, staying in the gene pool is optional. But in the long term, there looks like there will always be someone there to take these jobs. The ones resisting too succesfuly are leaving the gene pool and make room for the ones who really have no choice in the end.