The ten-part process for establishment of the Kingdom of God on earth – described by Shoghi Effendi

…the vast, the majestic process, set in motion at the dawn of the Adamic cycle… -- a process which commenced six thousand years ago, with the planting, in the soil of the divine will, of the tree of divine revelation, and which has already passed through certain stages and must needs pass through still others ere it attains its final consummation. The first part of this process was the slow and steady growth of this tree of divine revelation, successively putting forth its branches, shoots and offshoots, and revealing its leaves, buds and blossoms, as a direct consequence of the light and warmth imparted to it by a series of progressive Dispensations associated with Moses, Zoroaster, Buddha, Jesus, Muhammad and other Prophets, and of the vernal showers of blood shed by countless martyrs in their path. The second part of this process was the fruition of this tree, 'that belongeth neither to the East nor to the West,' when the Báb appeared as the perfect fruit and declared His mission in the Year Sixty [1844] in the city of Shiraz. The third part was the grinding of this sacred seed, of infinite preciousness and potency, in the mill of adversity, causing it to yield its oil, six years later, in the city of Tabriz [1850]. The fourth part was the ignition of this oil by the hand of Providence in the depths and amidst the darkness of the Siyah-Chal of Tihran a hundred years ago [1852]. The fifth, was the clothing of that flickering light, which had scarcely penetrated the adjoining territory of 'Iraq, in the lamp of revelation, after an eclipse lasting no less than ten years, in the city of Baghdad [1863]. The sixth, was the spread of the radiance of that light, shining with added brilliancy in its crystal globe in Adrianople [1863- 1868], and later on in the fortress town of 'Akka [1868-1877], to thirteen countries in the Asiatic and African continents. The seventh was its projection, from the Most Great Prison, in the course of the ministry of the Centre of the Covenant [1892-1921], across the seas and the shedding of its illumination upon twenty sovereign states and dependencies in the American, the European, and Australian continents. The eighth part of that process was the diffusion of that same light in the course of the first, and the opening years of the second, epoch of the Formative Age of the Faith [1921-1953], over ninety-four sovereign states, dependencies and islands of the planet, as a result of the prosecution of a series of national plans, initiated by eleven national spiritual assemblies throughout the Baha'i world, utilizing the agencies of a newly emerged, divinely appointed Administrative Order, and which has now culminated in the one hundredth anniversary of the birth of Bahá'u'lláh's Mission. The ninth part of this process -- the stage we are now entering [1953] -- is the further diffusion of that same light over one hundred and thirty-one additional territories and islands in both the Eastern and Western Hemispheres, through the operation of a decade-long world spiritual crusade whose termination will, God willing, coincide with the Most Great Jubilee commemorating the centenary of the declaration of Bahá'u'lláh in Baghdad. And finally the tenth part of this mighty process [1963-] must be the penetration of that light, in the course of numerous crusades and of successive epochs of both the Formative and Golden Ages of the Faith, into all the remaining territories of the globe through the erection of the entire machinery of Baha'u'llah's Administrative Order in all territories, both East and West, the stage at which the light of God's triumphant Faith shining in all its power and glory will have suffused and enveloped the entire planet" 

- Shoghi Effendi  (‘Messages to the Baha’i World’ - 1950-1957)