" ... one of the great principles of Bahá’u’lláh’s teachings is the establishment of agreement among the peoples of the world."

"...Therefore, I left my native land to associate here with those who are the standard-bearers of international conciliation and agreement. Having traveled from coast to coast, I find the United States of America vast and progressive, the government just and equitable, the nation noble and independent. I attended many meetings where international peace was discussed and am always extremely happy to witness the results of such meetings, for one of the great principles of Bahá’u’lláh’s teachings is the establishment of agreement among the peoples of the world. He founded and taught this principle in the Orient fifty years ago. He proclaimed international unity, summoned the religions of the world to harmony and reconciliation and established fellowship among many races, sects and communities. At that time He wrote Epistles to the kings and rulers of the world, calling upon them to arise and cooperate with Him in spreading these principles, saying that the stability and advancement of humanity could only be realized through the unity of the nations. Through His efforts this principle of universal harmony and agreement was practically demonstrated in Persia and other countries..."

`Abdu'l-Bahá,  The Promulgation of Universal Peace, p.388 

5 November 1912 
(excerpt from) Talk at Grand Hotel 
Cincinnati, Ohio