After Unity is established, Peace reigns...
Actually Living Peace demands a lot:
Be thou a summoner to love, and be thou kind to all the human race. Love thou the children of men and share in their sorrows. Be thou of those who foster peace. Offer thy friendship, be worthy of trust. Be thou a balm to every sore, be thou a medicine for every ill. Bind thou the souls together. Recite thou the verses of guidance. Be engaged in the worship of thy Lord, and rise up to lead the people aright. Loose thy tongue and teach, and let thy face be bright with the fire of God's love. Rest thou not for a moment, seek thou to draw no easeful breath. Thus mayest thou become a sign and symbol of God's love, and a banner of His grace.
('Abdu'l-Bahá, Selections from the Writings of 'Abdu'l-Bahá, p. 26)
It behoveth him who is a wayfarer in the path of God and a wanderer in His way to detach himself from all who are in the heavens and on the earth. He must renounce all save God, that perchance the portals of mercy may be unlocked before his face and the breezes of providence may waft over him. And when he hath inscribed upon his soul that which We have vouchsafed unto him of the quintessence of inner meaning and explanation, he will fathom all the secrets of these allusions, and God shall bestow upon his heart a divine tranquillity and cause him to be of them that are at peace with themselves.
(Bahá’u’lláh, Gems of Divine Mysteries)
International Peace and Religion:
On the one hand, the search for justice and the promotion of the cause of international peace tend to have the effect of also arousing new perceptions of the individual's role in society. Similarly, although focused on the mobilization of support for changes in social decision-making, movements like environmentalism and feminism induce a re-examination of people's sense of themselves and of their purpose in life. A reorientation occurring in all the major religious communities is the accelerating migration of believers from traditional branches of the parent faiths to sects that attach primary importance to the spiritual search and personal experiences of their members.
(Commissioned by The Universal House of Justice, One Common Faith)
This, truly, is the Peace, this is the Highest, namely the end of all formations, the forsaking of every substratum of rebirth, the fading away of craving: detachment, extinction-Nirvana.
Enraptured with lust, enraged with anger, blinded by delusion, overwhelmed, with mind ensnared, man aims at his own ruin, at others' ruin, at the ruin of both parties, and he experiences mental pain and grief. But, if lust, anger, and delusion are given up, man aims neither at his own ruin, nor at others' ruin, nor at the ruin of both parties, and he experiences no mental pain and grief. Thus is Nirvana immediate, visible in this life, inviting, attractive, and comprehensible to the wise.
The extinction of greed, the extinction of anger, the extinction of delusion: this, indeed, is called Nirvana.
((The Eightfold Path), Buddha, the Word (The Eightfold Path))
Clear, spiritual thinking is necessary:
Moreover this was not enough for them, that they erred in the knowledge of God; but whereas they lived in the great war of ignorance, those so great plagues called they peace.
(Deuterocanonical Apocrypha, Wisdom)
Peace can be infectious:
2:6 The law of truth was in his mouth, and iniquity was not found in his lips: he walked with me in peace and equity, and did turn many away from iniquity.
(King James Bible, Malachi)
Utmost Perfect Peace:
Greater than gifts, better than prayer or fast,
Such wisdom is! The Yogi, this way knowing,
Comes to the Utmost Perfect Peace at last.
(Hindu, Bhagavad Gita (Edwin Arnold tr))
The Prophet-Founders of Religion bring Peace:
O ye people of the Book! our Apostle has come to you to explain to you much of what ye had hidden of the Book, and to pardon much. There has come to you from God a light, and a perspicuous Book; God guides thereby those who follow His pleasure to the way of peace, and brings them into a right way.
(The Qur'an (E.H. Palmer tr), Sura 5 - The Table)
To him who holds in his hands the Great Image (of the invisible Tao), the whole world repairs. Men resort to him, and receive no hurt, but (find) rest, peace, and the feeling of ease.
(Tao, Tao Te Ching (J. Legge tr))