One cannot be promoted to civilized life unless one comes to Kṛṣṇa consciousness, for by nature one is destined to live in a particular situation according to one's karma and association with the modes of nature. If men want to live in harmony and peace, they must take to Kṛṣṇa consciousness, for they cannot achieve the highest standard while absorbed in the bodily concept of life.
(Srimad Bhagavatam----5:1:40----purport).

Dishonest miscreants flourish because of cowardly and impotent executive heads of state. But when the executive heads are strong enough to curb all sorts of dishonest miscreants, in any part of the state, certainly they cannot flourish. When the miscreants are punished in an exemplary manner, automatically all good fortune follows. As said before, it is the prime duty of the king or the executive head to give protection in all respects to the peaceful, offenseless citizens of the state. The devotees of the Lord are by nature peaceful and offenseless, and therefore it is the prime duty of the state to arrange to convert everyone to become a devotee of the Lord. Thus automatically there will be peaceful, offenseless citizens. Then the only duty of the king will be to curb the dishonest miscreants. That will bring about peace and harmony all over human society.
(Srimad Bhagavatam----1:17:14----purport).

If economic development and material comforts could drive away one's lamentations for family, social, national or international inebrieties, then Arjuna would not have said that even an unrivaled kingdom on earth or supremacy like that of the demigods in the heavenly planets would be unable to drive away his lamentations. He sought, therefore, refuge in Kṛṣṇa consciousness, and that is the right path for peace and harmony. Economic development or supremacy over the world can be finished at any moment by the cataclysms of material nature. Even elevation into a higher planetary situation, as men are now seeking on the moon planet, can also be finished at one stroke. The Bhagavad-gītā confirms this: kṣīṇe puṇye martya-lokaṁ viśanti. "When the results of pious activities are finished, one falls down again from the peak of happiness to the lowest status of life." Many politicians of the world have fallen down in that way. Such downfalls only constitute more causes for lamentation.
(Bhagavad-Gita----2:8----purport).

The great endeavor the mahātmā undertakes to execute devotional service is more intense than the ordinary man's voluntary acceptance of excessive pains and troubles to maintain his family and home. The struggle for maintaining family and relatives is illusion, or māyā. Hence it is truly distressing. By contrast, the difficulties one accepts in serving the Supreme Lord are transcendental, and therefore they are a source of sublime bliss. Moreover, a person who serves the Supreme Lord automatically serves his family. But the opposite is not true: serving the family is not equivalent to serving the Lord. All mahātmās agree on this point. Not only does the person who serves the Supreme Lord serve his relatives, but he also serves the entire world of moving and nonmoving living beings. Thus service to Lord Kṛṣṇa is the prime cause of world peace and harmony.
(Renunciation Through Wisdom).