When Lord Rāmacandra, the Supreme Personality of Godhead, was the King of this world, all bodily and mental suffering, disease, old age, bereavement, lamentation, distress, fear and fatigue were completely absent. There was even no death for those who did not want it.
All these facilities existed because of Lord Rāmacandra's presence as the King of the entire world. A similar situation could be introduced immediately, even in this age called Kali, the worst of all ages. It is said, kali-kāle nāma-rūpe kṛṣṇa-avatāra: Kṛṣṇa descends in this Kali-yuga in the form of His holy name—Hare Kṛṣṇa, Hare Rāma. If we chant offenselessly, Rāma and Kṛṣṇa are still present in this age. The kingdom of Rāma was immensely popular and beneficial, and the spreading of this Hare Kṛṣṇa movement can immediately introduce a similar situation, even in this Kali-yuga.

(Srimad Bhagavatam------9:10:53------translation and purport).

Therefore the prajās, or the people in general, must take to the Kṛṣṇa consciousness movement, the Hare Kṛṣṇa movement, which is the sound incarnation of the Supreme Personality of Godhead. Kali-kāle nāma-rūpe kṛṣṇa-avatāra: Kṛṣṇa, the Supreme Personality of Godhead, has now appeared as an incarnation by His holy name. Therefore, when the prajās become Kṛṣṇa conscious, they can then expect a good government and good society, a perfect life, and liberation from the bondage of material existence.

(Srimad Bhagavatam------9:15:15-------purport).

One politician has remarked that the Kṛṣṇa consciousness movement is spreading like an epidemic and that if not checked immediately, within ten years it may capture governmental power. There is, of course, such potency in the Kṛṣṇa consciousness movement. As stated by authorities (CC.1:17:22), kali-kāle nāma-rūpe kṛṣṇa-avatāra: in this age, Kṛṣṇa has appeared in the Hare Kṛṣṇa mahā-mantra. The Kṛṣṇa consciousness movement is spreading like wildfire all over the world, and it will go on doing so. Men who are like Kaṁsa are very much afraid of the movement's progress and acceptance by the younger generation, but as Kṛṣṇa could not be killed by Kaṁsa, this movement cannot be checked by men of Kaṁsa's class.

(Srimad Bhagavatam------10:2:20-------purport).

Kṛṣṇa appears in this world for two purposes, paritrāṇāya sādhūnāṁ vināśāya ca duṣkṛtām: (B.G.4:8) to protect the innocent, religious devotees of the Lord and to annihilate all the uneducated, uncultured asuras, who unnecessarily bark like dogs and fight among themselves for political power. It is said, kali-kāle nāma-rūpe kṛṣṇa avatāra. The Hare Kṛṣṇa movement is also an incarnation of Kṛṣṇa in the form of the holy name (nāma-rūpe). Every one of us who is actually afraid of the asuric rulers and politicians must welcome this incarnation of Kṛṣṇa: Hare Kṛṣṇa, Hare Kṛṣṇa, Kṛṣṇa Kṛṣṇa, Hare Hare/ Hare Rāma, Hare Rāma, Rāma Rāma, Hare Hare.

(Srimad Bhagavatam------10:3:21-------purport).