With the publication of "Baha'u'llah and the New Era" more than ten years ago, the Baha'i Faith was given its first well-conceived, thorough exposition by a student of the teachings.

Recognizing its value as the most satisfactory introduction to the Cause, Baha'is in both East and West have found Dr.Esslemont's book so helpful that it has been translated into some thirty different languages.
As Dr.Esslemont himself recognized, the Faith entered a new phase of its history after the ascension of 'Abdu'l-Baha.

The result is that the author's views, some of them written prior to 1921, no longer, on certain aspects of the subject, correspond to the evolutionary character of the Faith.

His treatment of events and social conditions then existing, moreover, no longer appears fully relevant.

Unavoidably, a few errors of fact had entered his text, while his explanation of the stations of the Bab and of 'Abdu'l-Baha have been replaced in the minds of Baha'is by the authoritative interpretations since made by the first Guardian of the Faith, Shoghi Effendi.
The present edition therefore represents a revision made by the American National Spiritual Assembly, acting under the advice and approval of Shoghi Effendi.
These revisions in no respect alter the original plan of Dr.Esslemont's book, nor affect the major portion of his text.