Secret of Divine Civilization
Read online at http://bahai-library.com/abdulbaha_secret_divine_civilization (or with this authoritative English translation along with the original Persian and an earlier translation at http://bahai-library.com/abdulbaha_mysterious_forces_civilization )
The Mysterious Forces of Civilization (former name of this work) is an important epistle which vivifies, civilizes, and educates souls with the best virtues and best of politics
"As to the Epistles, The Mysterious Forces of Civilization and the Traveler's Narrative: Verily, they are the important epistles which vivify and civilize the souls and educate them with the best virtues and the best of politics. Therefore, attach ye to them great importance, and ye, O ye who are noble, do not waste your time in discussions that are useless and from which no benefit can be obtained; it is encumbent upon ye to elevate the Word of God and to spread the fragrances of God."
An outstanding contribution to the future reorganization of the world
"...The Secret of Divine Civilization (The Mysterious Forces of Civilization), `Abdu'l-Bahá's outstanding contribution to the future reorganization of the world..."
- pp. 92-94 - Regarding the book apparently referred to by 'Abdu'l-Bahá, History of the Intellectual Development of Europe, see http://bahai-library.com/draper_intellectual_development_europe