In the ancient times King Ravana had committed this sinful practice and consequently people had lost their good sense. He had tortured Lord Shanishchara who told Vibhishana, that his brother Ravana with the help of invisible forces was causing havoc on Earth and as a result people had lost their thinking power and a number of deadly epidemics had spread worldwide. He then requested Vibhishana to put a stop to Ravana's sins since being his brother he must be aware of the secret activity of Ravana and also of the place where he was performing the demoniac rites. He (Shanishchara) impressed upon Vibhishana that if he failed to get such activity stopped by making public the secrets of his mystical rite and the place where it was performed, it would cost him dear so much so that his own family would be subjected. to untold suffering. On hearing such fearful forebodings from Shanishchara Vibhishana thought that since Shanishchara had come to know about his brother Ravana's deviltry, he must not try to hid anything, or else he too, along with Ravana, would be tormented and harmed by Shanishchara.
So Vibhishana, who was religious minded and God fearing confided in him the details of his brother Ravana's sinful act which the latter had thus far been keeping a closely guarded secret. Ravana's Kingdom Lanka, which was till then hidden under the deep sea, surfaced after Vibhishana made that disclosure. When Shanishchara confronted Ravana with hi questions, the latter had to tell the former, though not fully but, only partly, what he did day and night. He wanted to keep some of his secrets only to himself so that he could still retain the demoniac power to cause devastation and then establish his rule over the whole world.
Realising this, Shanishchara pondered deeply and decided to tell the world about Ravana's designs and secret activities. He let the people know that armed with his demoniac powers, Ravana had controlled the deities of rains and death and having done so he had been causing disasters at his will.
It was a horrifying revelation to the people of the world, who then knew it for certain that it was under the influence of Ravana's magical rite that they had lost their sense of judgement. They expressed their gratitude to Shanishchara who had opened their eyes by telling them about the misdeeds of Ravana. Had Ravana not tortured Shanishchara, people would not have become aware of Ravana's sins and Ravana would have achieved his secret ambition of capturing the whole world and making people' suffer misery and misfortune Having suffered at the hands of Ravana, Shanishchara warned the people of the world to be on their guards against \the evil designs of Ravana.
The warning was taken very seriously by the people who then got united to foil the designs of Ravana who had secretly planned to wipe out the population of the world except his own clan and to take all the continents of the world under his own command. When people succeeded in demolishing Ravana's devilish designs, happiness returned to them and their progeny. References to this effect are found in ancient scriptures.
The Puranas and other ancient treatises contain references which describe that the demon King Ravana had set up the city of Lanka in the midst of the Ratnakara Sagara (the Indian Ocean), an unending expanse of water. Simultaneously, he created Heaven and Hell and also eighty four lakh Kundis or pits brimming with blood and pus. The Kundis bore the names of the sages to ward off the outsiders. Thus the city of Lanka was made impregnable and anyone who dared venture into the sea in order to approach Lanka, was instantly drowned. The strong spell of the Indrajal let loose by Ravana made it impossible for any one to enter the territory of Lanka. People didn't know that it was Ravana's magic power which revented them from entering Lanka. It was during the time of Ravana that the contrivance of dreams and planetary positions to create an unwholesome influence on the minds of the people was first practised. He also produced and circulated some mystical literature of his demoniac science with a view to destroying the wisdom and the sense of judgement of the people. Ancient writings contain references to this effect. The people of the world decided to dismantle the spell of Ravana's magic rite and got ready for that but they did not know how to reach Lanka. After some time a strategy was planned and accordingly the Kings and rulers as also the subjects of the whole world raised a huge army and captivated Ravana's brothers and sons who were living in India along with their forces. They were harassed. Ravana's brother Vibhishana was persuaded by Shanishchara to disclose the sins of Ravana to all the Kings and rulers of the world and only then the people of the world could be saved. But for Shanishchara's concern for humanity, Ravana would have succeeded in wiping out the entire human race.
After Ravana, King Hiranyakaship did the same thing fie too got destroyed the thinking power of the people under the influence of his magical rite. But again during his time the ruler and the common people joined hands to undo the effect of hi sinful act and thereby saved the world from total destruction. He too had planned to annihilate the entire human population and to take in his possession the entire riches of Earth.
To achieve his nefarious objective he too created Swa a (Heaven) and Naraka (Hell) and also eighty four lakh Kundis r pits filled with blood and pus for performing his magical ri e. U nder the influence of his devilish rite also people lost their sense of judgement. Narasingh (an incarnation of Lord Vishnu) told the world about the sin committed by the demon secretly. Then people realised that all the ills on Earth were caused by Hiranyakashipu by means of his demoniac activity. Fhis revelation brought all the Kings and rulers together whose efforts rid the world of the diabolism of Hiranyakashipu. Thus his plans to establish his rule through the length and breadth of the world were foiled and Earth saved from destruction.