I think Manly Hall suggested the Lost tribes 'of Israel' were those people who fled the Atlantian flood and were spread across the planet to places like Egypt, India, China and the Americas (Mayans, Toltecs, etc.) among others; hence the uncanny similarity in the philosophies and architecture of these cultures, such as the pyramids of Egypt and Central and South America.
Max Heindel suggested the 'promised land' was all the land that surfaced after the flood (in the Bible know as Noah and the flood), or Atlantis.
