What is it?
absence of war or other hostilities
an agreement or a treaty to end hostilities
freedom from quarrels and disagreement; harmonious relations
Peace does not mean passive -
it means to be complete or whole, to be sound, to live well in safety. 'Salome' or 'Shalome', the Hebrew word used as victory over one's enemies, as a greeting and a farewell. It's an act of blessing on the one to whom it's spoken.
The world will once again live in peace, it will be both harmonious and productive but this will never happen until man has a the most important relationship of all relationships.