I remember an article I read back in the early seventies that explained how the saber tooth tiger became extinct because while its teeth gave it an advantage in the natural order of things, it was its teeth that eventually led to its demise. The females would mate with tigers having larger teeth, after time their teeth became too big and ineffective leading to starvation. The article then went on to explain how man’s opposable thumb, while also giving man an advantage in the natural order of things would one day be the very advantage to bring about his own demise. In the case of many opposable thumbs out there these days, that does indeed seem to be a concerning possibility.