10 million people are born every month. It is mathematically impossible for JWs to preach to the entire world and simply keep up with the birth rate.
This is just another example of where JW`s speak out of both sides of their mouth .
They have stated in their publications that not every single person needs to be witnessed to , just the fact that they have "Witnessed " to every continent on the earth to fulfill the prophecy that the "Good News is To be Preached In All The Inhabited Earth"
They pointed out that the scriptures do not say that every individual has to be preached to .
And that it is up to Jehovah/Jesus as to who is to be saved or not.
I`m sorry I can`t remember the articles that contained those words ,maybe somebody else can.
It was at least 25 years ago.