What is clear from the below verses is that the Jaredites lived in the northern lands that the Nephites would later be able to settle in for periods of time. The land of the Jaredies is a choice land above all other lands. The inhabitants must serve God, or they will be swept off when ripe in iniquity. In a future time (now), this land will be inhabited by Gentiles. The land is a choice land above all other lands. All of this sounds like a description of the United States of America.
Ether 2
7 And the Lord would not suffer that they should stop beyond the sea in the wilderness, but he would that they should come forth even unto the land of promise, which was choice above all other lands, which the Lord God had preserved for a righteous people.
8 And he had sworn in his wrath unto the brother of Jared, that whoso should possess this land of promise, from that time henceforth and forever, should serve him, the true and only God, or they should be swept off when the fulness of his wrath should come upon them.
9 And now, we can behold the decrees of God concerning this land, that it is a land of promise; and whatsoever nation shall possess it shall serve God, or they shall be swept off when the fulness of his wrath shall come upon them. And the fulness of his wrath cometh upon them when they are ripened in iniquity.
10 For behold, this is a land which is choice above all other lands; wherefore he that doth possess it shall serve God or shall be swept off; for it is the everlasting decree of God. And it is not until the fulness of iniquity among the children of the land, that they are swept off.
11 And this cometh unto you, O ye Gentiles, that ye may know the decrees of God—that ye may repent, and not continue in your iniquities until the fulness come, that ye may not bring down the fulness of the wrath of God upon you as the inhabitants of the land have hitherto done.
12 Behold, this is a choice land, and whatsoever nation shall possess it shall be free from bondage, and from captivity, and from all other nations under heaven, if they will but serve the God of the land, who is Jesus Christ, who hath been manifested by the things which we have written.
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15 And the brother of Jared repented of the evil which he had done, and did call upon the name of the Lord for his brethren who were with him. And the Lord said unto him: I will forgive thee and thy brethren of their sins; but thou shalt not sin any more, for ye shall remember that my Spirit will not always strive with man; wherefore, if ye will sin until ye are fully ripe ye shall be cut off from the presence of the Lord. And these are my thoughts upon the land which I shall give you for your inheritance; for it shall be a land choice above all other lands.