Although Resconstructionist Judaism does not require its membership to subscribe to any particular dogma, the Reconstructionist movement actively rejects or marginalizes certain beliefs held by other branches of Judaism, including many (if not all) of the 13 Principles. For example, Rabbi Kaplan "rejected traditional Jewish understandings of messianism. His God did not have the ability to suspend the natural order, and could thus not send a divine agent from the house of David who would bring about a miraculous redemption." Rather, in keeping with Reconstructionist naturalist principles, "Kaplan beieved strongly that ultimately, the world will be perfected, but only as a result of the combined efforts of humanity over generations." (Id. at 57) Similarly Reconstructionism rejects the 13th principle of resurrection of the dead, which Kaplan believed "belonged to a supernatural worldview rejected by moderns". (Id. at 58.) Thus, the Reconstructionist Sabbath Prayer Book erases all references to a messianic figure, and the daily 'Amidah replaces the traditional blessing of reviving the dead with one that blesses God "who in love remembers Thy creatures unto life". (Id. at 57-59.)