Unnecessarily, there was no need of killing animals. That is great sin. Dyūtaṁ pānaṁ striyaḥ sūnā yatrādharmaś catur-vidhaḥ (SB 1.17.38). Striya, illicit connection with woman, is sinful life. Unnecessarily killing animals, that is sinful life. Intoxication, that is sinful life. Gambling, that is also sinful life. When this Kali was excused, he surrendered himself to Mahārāja Parīkṣit that "You have asked me to go out of your kingdom, but where is out of your kingdom? The whole world is your kingdom. So kindly give me some place where I can stay." So Mahārāja Parīkṣit gave him these four places, that "You can stay where illicit sex life is going on." That mean prostitution. "And unnecessary animals are killed, slaughterhouse." Striya-sūnā-pāna-dyūta (SB 1.17.38). "Where intoxicants are indulged in or gambling. In these four places you can stay." So at that time, Kali could not find out such place, throughout the whole world. So he was disturbed. So there was conspiracy to kill Mahārāja Parīkṣit because the Kali could understand that so long Mahārāja Parīkṣit would live, it is impossible to find out a slaughterhouse or a brothel or a drinking house or gambling place. No.
So the kingdom was so nice. We have got description from Śrīmad-Bhāgavatam. Mahārāja Parīkṣit, Mahārāja Yudhiṣṭhira, many. The monarchy was so nice that because they were trained up, rājarṣi... They were not ordinary kings. They were as good as great sages and great saintly person. Imaṁ rājarṣayo viduḥ (BG 4.2). Kṛṣṇa said, imaṁ vivasvate yogaṁ proktavān aham avyayam (BG 4.1). Kṛṣṇa said to the sun-god Vivasvān. And so He said, "The sun-god transferred the teaching to his son Manu, and Manu transferred the teaching to Mahārāja Ikṣvāku." Evaṁ paramparā-prāptam (BG 4.2). In this way, the point is that the philosophy of Bhagavad-gītā was especially taught to the royal order because they would know. They should know.