From early histories it appears that the entire earth was under one culture, Vedic culture, but gradually, due to religious and cultural divisions, the rule fragmented into many subdivisions. Now the earth is divided into many countries, religions and political parties. Despite these political and religious divisions, we advocate that everyone should unite again under one culture — Krsna consciousness. People should accept one God, Krsna; one scripture, the Bhagavad-gita; and one activity, devotional service to the Lord. Thus people may live happily upon this earth and combine to produce sufficient food. In such a society, there would be no question of scarcity, famine or cultural or religious degradation. So-called caste systems and national divisions are artificial. According to our Vaisnava philosophy, these are all external bodily designations. The Krsna consciousness movement is not based upon bodily designations. It is a transcendental movement on the platform of spiritual understanding. If the people of the world understood that the basic principle of life is spiritual identification, they would understand that the business of the spirit soul is to serve the Supreme Spirit, Krsna. As Lord Krsna says in the Bhagavad-gita (15.7), mamaivamso jiva-loke jiva-bhutah sanatanah: “The living entities in this conditioned world are My eternal fragmental parts.” All living entities in different life forms are sons of Krsna. Therefore they are all meant to serve Krsna, the original supreme father. If this philosophy is accepted, the failure of the United Nations to unite all nations will be sufficiently compensated all over the world by a great Krsna consciousness movement.

From Srila Prabhupada’s purport to Cc Madhya 25.193