The Silmarillion

But Morgoth himself the Valar thrust through the Door of Night beyond the Walls of the World, into the Timeless Void; and a guard is set for ever on those walls, and Eärendil keeps watch upon the ramparts of the sky. Yet the lies that Melkor, the mighty and accursed, Morgoth Bauglir, the Power of Terror and of Hate, sowed in the hearts of Elves and Men are a seed that does not die and cannot be destroyed; and ever and anon it sprouts anew, and will bear dark fruit even unto the latest days.

Here ends the SILMARILLION. If it has passed from the high and the beautiful to darkness and ruin, that was of old the fate of Arda Marred; and if any change shall come and the Marring be amended, Manwë and Varda may know; but they have not revealed it, and it is not declared in the dooms of Mandos.

AKALLABÊTH The Downfall of Númenor

It is said by the Eldar that Men came into the world in the time of the Shadow of Morgoth, and they fell swiftly under his dominion; for he sent his emissaries among them, and they listened to his evil and cunning words, and they worshipped the Darkness and yet feared it. But there were some that turned from evil and left the lands of their kindred, and wandered ever westward; for they had heard a rumour that in the West there was a light which the Shadow could not dim. The servants of Morgoth pursued them with hatred, and their ways were long and hard; yet they came at last to the lands that look upon the Sea, and they entered Beleriand in the days of the War of the Jewels. The Edain these were named in the Sindarin tongue; and they became friends and allies of the Eldar, and did deeds of great valour in the war against Morgoth.

Of them was sprung, upon the side of his fathers, Bright Eärendil; and in the Lay of Eärendil it is told how at the last, when the victory of Morgoth was almost complete, he built his ship Vingilot, that Men called Rothinzil, and voyaged upon the unsailed seas, seeking ever for Valinor; for he desired to speak before the Powers on behalf of the Two Kindreds, that the Valar might have pity on them and send them help in their uttermost need. Therefore by Elves and Men he is called Eärendil the Blessed, for he achieved his quest after long labours and many perils, and from Valinor there came the host of the Lords of the West. But Eärendil came never back to the lands that he had loved.

In the Great Battle when at last Morgoth was overthrown and Thangorodrim was broken, the Edain alone of the kindreds of Men fought for the Valar, whereas many others fought for Morgoth. And after the victory of the Lords of the West those of the evil Men who were not destroyed fled back into the east, where many of their race were still wandering in the unharvested lands, wild and lawless, refusing alike the summons of the Valar and of Morgoth. And the evil Men came among them, and cast over them a shadow of fear, and they took them for kings. Then the Valar forsook for a time the Men of Middle-earth who had refused their summons and had taken the friends of Morgoth to be their masters; and Men dwelt in darkness and were troubled by many evil things that Morgoth had devised in the days of his dominion: demons, and dragons, and misshapen beasts, and the unclean Orcs that are mockeries of the Children of Ilúvatar. And the lot of Men was unhappy.