When I was a young man, my mother always used to tell me, that it is not possible to save the world. I remember I did not like the sound of it, the up giving feeling, and I remember, that I chose to think that it is wrong.
We as human beings have a choice, we can wage war if we so chose, or we can live in peace, if we so choose.
There are many obstacles to peace, and often we get sucked up by needs of everyday life, of our worse sides, of the envy, and the rancor. But in the end, if we follow the wise Zoroastrian master, we can put ourselves on a path of redemption.
G-d bless the process of peace.