We speak about it frequently, we pray for it, our leaders mention it, (and then continue with the arms trade). Our religious leaders speak of it. However, one has to ask is it possible? Will we ever obtain it? What will it take? Can anyone lead us in the direction of world peace?
I would suggest that some motivation may be necessary. The motivation for me comes from looking around the neighborhood, the galactic and universal neighborhood. It is somewhat quiet out there, with no inhabitable planets in our solar system. The nearest stars to us are in the Alpha Centauri star system, about 4.37 light-years away, and beyond our technical capability to reach.
Therefore, if we do not keep this, our home planet habitable, with breathable air and drinkable water and soil in which we can grow food, and peace between people and nations, the human race may cease to exist.
Remember that there is no Earth Two, there is no one who will come to our rescue.