The four descendants of Ikṣvāku are Rāma and the other sons of Daśaratha. The problem with not coronating a king immediately is that the country would perish [immediately].

NOTE. What kind of king did the country require? That is clear from Prabhupāda’s commentary to Śrīmad-Bhāgavatam (1.9.26) where he summarizing Bhīṣma’s instructions to Yudhiṣṭhira on this subject from the Mahābhārata. We quote them in full here:

The varṇāśrama-dharma is prescribed for the civilized human being just to train him to successfully terminate human life. Self-realization is distinguished from the life of the lower animals engaged in eating, sleeping, fearing and mating. Bhīṣmadeva advised for all human beings nine qualifications: (1) not to become angry, (2) not to lie, (3) to equally distribute wealth, (4) to forgive, (5) to beget children only by one’s legitimate wife, (6) to be pure in mind and hygienic in body, (7) not to be inimical toward anyone, (8) to be simple, and (9) to support servants or subordinates. One cannot be called a civilized person without acquiring the above-mentioned preliminary qualities.

The kṣatriya, the member of the administrative class, is especially advised to give charity and not to accept charity in any circumstances. Modern administrators raise subscriptions for some political functions, but never give charity to the citizens in any state function. It is just the reverse in the injunctions of the śāstras. The administrative class must be well versed in the śāstras, but must not take to the profession of teachers. Their energy should be especially directed towards killing the thieves, the dacoits, black marketier and all such undesirable elements of society. The administrators should never pretend to become nonviolent and thereby go to hell. When Arjuna wanted to become a nonviolent coward on the Battlefield of Kurukṣetra, he was severely chastised by Lord Kṛṣṇa. The Lord degraded Arjuna at that time to the status of an uncivilized man for his avowed acceptance of the cult of nonviolence. The administrative class must be personally trained in military education. 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 war-field. 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.

On the basis of Bhīṣma’s instructions in the Mahābhārata, Prabhupāda has further described the duties of king in his commentary to Śrīmad-Bhāgavatam (1.9.27) thus:

Rāja-dharma is a great science, unlike modern diplomacy for political supremacy. The kings were trained systematically to become munificent and not merely be tax collectors. They were trained to perform different sacrifices only for the prosperity of the subjects. To lead the prajās to the attainment of salvation was a great duty of the king.¹ The father, the spiritual master and the king are not to become irresponsible in the matter of leading their subjects to the path of ultimate liberation from birth, death, diseases and old age. When these primary duties are properly discharged, there is no need of government of the people, by the people. In modern days the people in general occupy the administration by the strength of manipulated votes, but they are never trained in the primary duties of the king, and that is also not possible for everyone. Under the circumstances the untrained administrators play havoc in the name of making the subjects happy in all respects. On the other hand, these untrained administrators gradually become rogues and thieves and increase the taxation to finance a top-heavy administration that is useless for all purposes. Actually, the qualified brāhmaṇas are meant to give direction to the kings for proper administration in terms of scriptures like the Manu-saṁhitā and the dharma-śāstras of Parāśara. A typical king is the ideal of the people in general, and if the king is pious, religious, chivalrous and munificent, the citizens generally follow him. Such a king is not lazy and sensuous, living at the cost of the subjects, but is alert always to kill thieves and dacoits. The pious kings were not merciful to dacoits and thieves in the name of nonsensical ahiṁsā (nonviolence). The thieves and dacoits were punished in an exemplary way so that in the future no one would dare commit such nuisances in an organized form. Such thieves and dacoits were never given positions of administration, as they are now.

The king had to see that the reserved energy of humanity was properly utilized. Human energy is meant not exactly for fulfilling animal propensities but for self-realization. The whole government was specifically designed to fulfill this particular purpose. As such, the king had to select properly the cabinet ministers, but not on the strength of voting background. The ministers, the military commanders and even the ordinary soldiers were all selected by personal qualification, and the king had to supervise them properly before they were appointed to their respective posts. The king was especially vigilant to see that the tapasvīs, or persons who sacrificed everything for disseminating spiritual knowledge, were never disregarded. The king knew well that the Supreme Personality of Godhead never tolerates any insult to His unalloyed devotees. Such tapasvīs were trusted leaders even of the rogues and thieves, who would never disobey the orders of tapasvīs. The king would give special protection to illiterates, the helpless and widows of the state. Defense measures were arranged previous to any attack by the enemies. The taxing process was easy, and it was not meant for squandering, but was for strengthening the reserve fund. The soldiers were recruited from all parts of the world, and they were trained for special duties.

And in his commentary to Śrīmad-Bhāgavatam 1.2.49, he describes a proper king and contrasts his governance with today’s situation:

Mahārāja Yudhiṣṭhira was not a mere tax collector. He was always conscious of his duty as a king, which is no less than that of a father or spiritual master. The king is to see to the welfare of the citizens from all angles of social, political, economic and spiritual upliftment. The king must know that human life is meant for liberating the encaged soul from the bondage of material conditions, and therefore his duty is to see that the citizens are properly looked after to attain this highest stage of perfection.

Mahārāja Yudhiṣṭhira is the ideal monarch, and monarchy under a trained king like Mahārāja Yudhiṣṭhira is by far the most superior form of government, superior to modern republics or governments of the people, by the people. The mass of people, especially in this Age of Kali, are all born śūdras, basically lowborn, ill-trained, unfortunate and badly associated. They themselves do not know the highest perfectional aim of life. Therefore, votes cast by them actually have no value, and thus persons elected by such irresponsible votes cannot be responsible representatives like Mahārāja Yudhiṣṭhira.

Prabhupāda further describes Mahārāja Yudhiṣṭhira’s rule in his commentary to Śrīmad-Bhāgavatam (1.10.3):

Mahārāja Yudhiṣṭhira was not a typically unenlightened political leader of modern democracy. Mahārāja Yudhiṣṭhira was instructed by Bhīṣmadeva and the infallible Lord also, and therefore he had full knowledge of everything in perfection.

The modern elected executive head of a state is just like a puppet because he has no kingly power. Even if he is enlightened like Mahārāja Yudhiṣṭhira, he cannot do anything out of his own good will due to his constitutional position. Therefore, there are so many states over the earth quarreling because of ideological differences or other selfish motives. But a king like Mahārāja Yudhiṣṭhira had no ideology of his own. He had but to follow the instructions of the infallible Lord and the Lord’s representative, an authorized agent like Bhīṣmadeva. It is instructed in the śāstras that one should follow the great authorities and the infallible Lord without any personal motive or manufactured ideology. Therefore, it was possible for Mahārāja Yudhiṣṭhira to rule the whole world, including the seas, because the principles were infallible and universally applicable to everyone. The conception of one world state can only be fulfilled if we can follow the infallible authority. An imperfect human being cannot create an ideology acceptable to everyone. Only the perfect and infallible can create a program which is applicable at every place and can be followed by all in the world. It is the person who rules, and not the impersonal government. If the person is perfect, the government is perfect. If the person is a fool, the government is a fool’s paradise. That is the law of nature. There are so many stories of imperfect kings or executive heads. Therefore, the executive head must be a trained person like Mahārāja Yudhiṣṭhira, and he must have the full autocratic power to rule over the world. The conception of a world state can take shape only under the regime of a perfect king like Mahārāja Yudhiṣṭhira. The world was happy in those days because there were kings like Mahārāja Yudhiṣṭhira to rule over the world.

Mārkaṇḍeya, Vasiṣṭha and the other sages residing in Ayodhyā were very interested in having the citizens protected by such genuine kings, trained monarchs incapable of corruption.