follow the Noahide laws. According to anthropologist Rachel Z. Feldman, many of the rabbis involved in mentoring Noahides are supporters of the Third Temple movement who believe that the messianic era begins with the establishment of a Jewish theocratic state in Israel, supported by communities of Noahides worldwide. Feldman describes Noahidism as a "new world religion" that "carv[es] out a place for non-Jews in the messianic Zionist project" and "affirms the superiority of Judaism and the Jewish biblical right to the Land of Israel". She characterizes Noahide ideology in the Philippines and elsewhere in the global south as having a "markedly racial dimension" constructed around "an essential categorical difference between Jews and Noahides". David Novak, professor of Jewish theology and ethics at the University of Toronto, has denounced the modern Noahide movement by stating that "If Jews are telling Gentiles what to do, it’s a form of imperialism". According to the Jewish philosopher and professor Menachem Kellner's study on Maimonidean texts (1991), a ger toshav could be a transitional stage on the way to becoming a "righteous alien" (, ger tzedek), i.e. a full convert to Judaism. He conjectures that, according to Maimonides, only a full ger tzedek would be found during the Messianic era. Furthermore, Kellner criticizes the assumption within Orthodox Judaism that there is an "ontological divide between Jews and Gentiles", which he believes is contrary to what Maimonides thought and the Torah teaches, stating that "Gentiles as well as Jews are fully created in the image of God". According to Menachem Mendel Schneerson, the status of ger toshav will continue to exist, even in the Messianic era. This is based on the statement in Hilkhot M'lakhim 12:5 that lit. “all the world (kol ha'olam) will be nothing but to know G‑d." In its plain meaning, he asserts, kol ha'olam also includes Gentiles. As proof, he cites 11:4, which deals with the Messianic era, and the similar term ha'olam kulo, "the world in its entirety", refers to Gentiles. Continuing the text in Hilkhot M'lakhim 12:5, Maimonides explicitly changes the topic to Jews by using the term Yisra'el, explaining that "Therefore, the Jews will be great sages and know the hidden matters, grasping the knowledge of their Creator according to the full extent of human potential", indicating that Jews and Gentiles will co-exist in the time of the Messiah. In any case, even when there is a Jewish king