If time travel were possible, someone from the future would have already come back.
That having been said, Wolf, perhaps you would have married someone else, as Ees would have, perhaps people who otherwise would have perished.
Yes, some people would have not existed (in their physical form), but the sum total would be much greater (all things being equal), and probably all of the same neshamos would have come down, plus more.
Probably, you would still have kids who you would love equally to your actual kids, and your kids would still exist, perhaps in different bodies.