"A world, growing to maturity,... must...recognize the oneness and wholeness of human relationships..."

The Guardian of the Bahá’í Faith
Shoghi Effendi

"The long ages of infancy and childhood, through which the human race had to pass, have receded into the background. Humanity is now experiencing the commotions invariably associated with the most turbulent stage of its evolution, the stage of adolescence, when the impetuosity of youth and its vehemence reach their climax, and must gradually be superseded by the calmness, the wisdom, and the maturity that characterize the stage of manhood. Then will the human race reach that stature of ripeness which will enable it to acquire all the powers and capacities upon which its ultimate development must depend."

"Unification of the whole of mankind is the hall-mark of the stage which human society is now approaching. Unity of family, of tribe, of city-state, and nation have been successively attempted and fully established. World unity is the goal towards which a harassed humanity is striving. Nation-building has come to an end. The anarchy inherent in state sovereignty is moving towards a climax. A world, growing to maturity, must abandon this fetish, recognize the oneness and wholeness of human relationships, and establish once for all the machinery that can best incarnate this fundamental principle of its life."

Shoghi Effendi, The World Order of Bahá’u’lláh

www.bahai.org/r/166959448

"The principle of the Oneness of Mankind, the pivot round which all the teachings of Bahá’u’lláh revolve...implies an organic change in the structure of present-day society..."

Inner Courtyard of the House of ‘Abdu’lláh Páshá

"Let there be no mistake. The principle of the Oneness of Mankind—the pivot round which all the teachings of Bahá’u’lláh revolve—is no mere outburst of ignorant emotionalism or an expression of vague and pious hope.… Its message is applicable not only to the individual, but concerns itself primarily with the nature of those essential relationships that must bind all the states and nations as members of one human family. 

It does not constitute merely the enunciation of an ideal, but stands inseparably associated with an institution adequate to embody its truth, demonstrate its validity, and perpetuate its influence. It implies an organic change in the structure of present-day society, a change such as the world has not yet experienced. 

It constitutes a challenge, at once bold and universal, to outworn shibboleths of national creeds—creeds that have had their day and which must, in the ordinary course of events as shaped and controlled by Providence, give way to a new gospel, fundamentally different from, and infinitely superior to, what the world has already conceived. 

It calls for no less than the reconstruction and the demilitarization of the whole civilized world—a world organically unified in all the essential aspects of its life, its political machinery, its spiritual aspiration, its trade and finance, its script and language, and yet infinite in the diversity of the national characteristics of its federated units."

Shoghi Effendi, The World Order of Bahá’u’lláh
www.bahai.org/r/596242626