Just like in the state, if people abide by the laws nicely, then it is very easy to administer; things are going on very nicely. But if people become criminals, it becomes a overburden to the state administrators.
So such thing happens because this is material world. And the demons and the demigods, they are always there, existing. But when the demonic power becomes increased, then the world becomes overburdened. Sīdantyā bhūri-bhāreṇa jāto hy ātma-bhuvārthitaḥ (SB 1.8.34). Ātma-bhū. Ātmabhū is Brahmā's name. He's directly born of the Supreme Soul, Viṣṇu. He's not born as usually we do, from the womb of mother. So Brahmā was born from the navel of Garbhodakaśāyī Viṣṇu. Therefore his another name is Ātmabhū, Svayambhū. Svayambhū. These are different names of Brahmā. Svayambhūr nāradaḥ śambhuḥ (SB 6.3.20). These are the . . . Brahmā is one . . . one of the authorities. He's also mentioned in the list of authorities, dvādaśa-mahājana, twelve authorities.