Since just before the dawn of Kali-yuga (the age of quarrel and hypocricy) 5000 years ago, the earth has become overburded with unnecessary military buildup. The problem is large enough for the Lord himself to appear millennium after millennium.
"In order to deliver the pious and to annihilate the miscreants, as well as to reestablish the principles of religion, I advent Myself, millennium after millennium." - Bhagavad-gita 4.8
First paragraph of Krsna Book (The Advent of Lord Krsna)
Once the world was overburdened by the unnecessary defense force of different kings, who were actually demons but were posing themselves as the royal order. At that time, the whole world became perturbed, and the predominating deity of this earth, known as Bhumi, went to see Lord Brahma to tell of her calamities due to the demoniac kings. Bhumi assumed the shape of a cow and presented herself before Lord Brahma with tears in her eyes. She was bereaved and was weeping just to invoke the Lord's compassion. She related the calamitous position of the earth, and after hearing this, Lord Brahma became much aggrieved, and he at once started for the ocean of milk, where Lord Visnu resides. Lord Brahma was accompanied by all the demigods headed by Lord Siva, and Bhumi also followed. Arriving on the shore of the milk ocean, Lord Brahma began to pacify the Lord Visnu, who formerly saved the earthly planet by assuming the transcendental form of a boar.
Srimad-Bhagavatam, Canto 1, Ch. 9, Text 26, Purport
Cowards should not be elevated to the presidential throne by dint of numerical votes only. The monarchs were all chivalrous personalities, and therefore monarchy should be maintained provided the monarch is regularly trained in the occupational duties of a king. In fighting, the king or the president should never return home without being hurt by the enemy. The so-called king of today never visits the warfield. He is very much expert in artificially encouraging the fighting strength in the hope of false national prestige. As soon as the administrative class is turned into a gang of mercantile and laborer men, the whole machinery of government becomes polluted.
Srimad- Bhagavatam, First Canto, Ch. 17, Text 27
Now she, the chaste one, being unfortunately forsaken by the Personality of Godhead, laments her future with tears in her eyes, for now she is being ruled and enjoyed by lower-class men who pose as rulers.
The ksatriya, or the man who is qualified to protect the sufferers, is meant to rule the state. Untrained lower-class men, or men without ambition to protect the sufferers, cannot be placed on the seat of an administrator. Unfortunately, in the age of Kali the lower-class men, without training, occupy the post of a ruler by strength of popular votes, and instead of protecting the sufferers, such men create a situation quite intolerable for everyone. Such rulers illegally gratify themselves at the cost of all comforts of the citizens, and thus the chaste mother earth cries to see the pitiable condition of her sons, both men and animals. That is the future of the world in the age of Kali, when irreligiosity prevails most prominently. And in the absence of a suitable king to curb irreligious tendencies, educating the people systematically in the teaching of Srimad-Bhagavatam will clear up the hazy atmosphere of corruption, bribery, blackmail, etc.