British Israelism (sometimes called Anglo-Israelism) is a complex set of theories, not necessarily compatible with each other, that have in common the idea that some ancient British people and/or royal lineages were direct lineal descendants of some of the Lost Tribes of Israel. - Excerpted from British Israelism on Wikipedia, the free encyclopedia. This work is intended primarily as a thorough examination and debunking of Anglo-Israelism, the theory that Anglo-Saxons are somehow the actual historical Israel to the exclusion of modern day Jews. The work also tackles to a lesser degree the more common theory of "Replacement Theology" or "Supersessionism" and gives it similar treatment. The author, David Baron, was a Hebrew-Christian, long before that movement, or the often intertwined Messianic Judaism movement, became more widely popularized circa the 1960's.