I don’t think there is any such thing as Peace of Earth, except in songs and prayers.
In some parts of the Earth, there is/can be Peace.
In some parts of the Earth, this seems to be far more difficult, thogh (I like to think) not impossible.
If you avoid/resolve unpleasant and hurtful conflicts with those with whom you interact you are contributing to the peace in your niche of the Earth.
Spurts of Thought 