The appearance of genuine brotherhood signifies that a social order has arrived in which all men delight in bearing one another’s burdens; they actually desire to practice the golden rule.  Brotherhood is one of the most powerful and most tenuous factor of civilization. 
Only through, and by appeal to, the Adjuster can mankind ever attain unity and brotherhood.  Approaching other religions with the recognition of the truths which are held in common.  Economic interdependence and social fraternity will ultimately conduce to brotherhood.  Religious revelation is essential to the realization of brotherhood on Urantia.  Such a quality of brotherly affection is invariably manifested itself in unselfish and loving social service.  Micah taught about a day in which everybody would live according to his understanding of God.  Brotherhood will be achieved through:
Rather did the early races learn by sad experience that “in union there is strength”; and it is this lack of natural brotherly attraction that now stands in the way of the brotherhood of man on Urantia.  Future prophets should not strengthen interrligious barriers but augment the religious brotherhood.  Seldom do races of different colors and varied natures take kindly to the plan of human brotherhood. 
Religious peace—brotherhood—can never exist unless all religions are willing to completely divest themselves of all ecclesiastical authority and fully surrender all concept of spiritual sovereignty.  There cannot be peace between light and darkness, between life and death, between truth and error.  Always happens an inevitable clash between religions of spirit and religious of authority. 
Always we may have diversity of intellectual comprehension and interpretation, even varying degrees of socialization, but lack of spiritual brotherhood is both inexcusable and reprehensible.  Unless religious, brotherhood is an abstraction devoid of love.