Widely known as The Prayer of St. Francis, it is not found in Esser's authoritative collection of Francis's writings.
[Fr. Kajetan, Esser, OFM, ed., Opuscula Sancti Patris Francisci Assisiensis, Rome, Grottaferrata, 1978]. Additionally there is no record of this prayer before the twentieth century.
[Fr. Regis J., Armstrong, OFM, Francis and Clare: The Complete Works, New York, Paulist Press, 1982, 10, 0-8091-2446-7]. Dr. Christian Renoux of the University of Orleans in France traces the origin of the prayer to an anonymous 1912 contributor to La Clochette, a publication of the Holy Mass League in Paris. It was not until 1927 that it was attributed to St. Francis.
The Origin of the Peace Prayer of St. Francis, 2013-06-28, Renoux, Christian http://www.franciscan-archive.org/franciscana/peace.html,.
[Christian, Renoux, La prière pour la paix attribuée à saint François: une énigme à résoudre, Paris, Editions franciscaines, 2001, 2-85020-096-4].
Misattributed