May 4

About fifty years ago, His Holiness Baha’u’llah proclaimed certain Teachings and raised the Song of Universal Peace. In numerous Tablets and sundry Epistles He foretold, in the most explicit language, the present cataclysmal events [WWI] stating that the world of humanity was facing the most portentous danger and asserting categorically that the realization of Universal War was unfortunately inevitable and unavoidable. For these combustible materials which were stored in the infernal arsenals of Europe would explode by contact with one spark.

Among other things, "the Balkans will become a volcano and the map of Europe will be changed." For these and similar reasons He (Baha’u’llah) invited the world of humanity to Universal Peace. He wrote a number of Epistles to the kings and rulers and in those epistles He explained the destructive evils of war and dwelt on the solid benefits and nobler influences of Universal Peace. 
- ‘Abdu’l-Baha  (From a Tablet; Star of the West, vol. 5, no. 16, December 31, 1914)