[Elladan and Elrohir]

The gift of foresight was given to the Elves (presumably by Eru), and then to some degree to the Dunedain. Aragorn had at least two accurate foresights:<P>He told Elrond that the hour of choice laid before the children of Elrond was at hand (Appendix A).<P>He told Eomer that they would meet again in battle, "though all the hosts of Mordor lie between."<P>And, of course, there is Faramir's curse, or doom, or foresight, or whatever you want to call it, when he condemned Gollum to death if Gollum ever betrayed his master. And we all know what eventually happened.<P>So the gift of foresight (or prophecy) was definitely not limited to the Elves, and, as Essex has pointed out, even hobbits could make accurate predictions (though I'm not sure I would classify them as "foresights").