Religion and Social Evolution

 "Abdu’l-Bahá Himself elucidates this truth in one of His Tablets: “In cycles gone by, though harmony was established, yet, owing to the absence of means, the unity of all mankind could not have been achieved. Continents remained widely divided, nay even among the peoples of one and the same continent association and interchange of thought were well-nigh impossible.
Consequently intercourse, understanding and unity amongst all the peoples and kindreds of the earth were unattainable. In this day, however, means of communication have multiplied, and the five continents of the earth have virtually merged into one….
Hence the unity of all mankind can in this day be achieved. Verily this is none other but one of the wonders of this wondrous age, this glorious century. Of this past ages have been deprived, for this century—the century of light—has been endowed with unique and unprecedented glory, power and illumination.

Shoghi Effendi: The Promised Day Is Come