It would take a world populated by something other than human beings. Neitzsche proposed that mankind play God by recreating himself in his own image, i.e. by making himself into the Ubermensche, but if you think about it that's absurd. Why would you bother to remake yourself when you would merely recreate the same being, with all the same characteristics, which is all you could possibly do? At any rate, it's impractical. The sociopolitical left has been trying to do it ever since with different labels, e.g. the New Socialist Man and other sillinesses, and it's made no progress (so to speak) atall.
No, it's not possible to have a human world free of violence, given that violence is an inherent, inseparable part of human nature. The best we can do is to try to keep it from breaking out all around us every day. That in fact is the first function of the law, to restrain the initiation of violence in our daily transactions. In that way we already are doing what we can.