...all the members of the human family, whether peoples or
governments, cities or villages, have become increasingly interdependent. For
none is self-sufficiency any longer possible, inasmuch as political ties unite
all peoples and nations, and the bonds of trade and industry, of agriculture
and education, are being strengthened every day. Hence the unity of all mankind
can in this day be achieved.
- ‘Abdu’l-Baha (Cited in Shoghi Effendi, ‘The World
Order of Bahá'u'lláh: Selected Letters’;
The Compilation of Compilations, vol. III, Economics, Agriculture, and
Related Subjects)