The Christian egalitarian hermeneutic has received a highly systematic treatment from William J. Webb, professor of New Testament at Heritage Theological Seminary, Ontario, Canada. Webb argues that a major challenge is determining which biblical commands are "transcultural" and therefore applicable today, versus those which are "cultural" and therefore only applicable to the original (1st century) recipients of the text. His "redemptive movement" hermeneutic is justified using the example of slavery, which Webb sees as analogous to the subordination of women. Christians today largely perceive that slavery was "cultural" in biblical times and not something that should be re-introduced or justified, although slavery was (a) found in the Bible and (b) not explicitly banned there. Webb recommends that biblical commands be examined in light of the cultural context in which they were originally written. According to the "redemptive approach", slavery and women's subordination are found in the Bible; however, the same Scriptures also contain ideas and principles which, if developed and taken to their logical conclusion, would bring about the abolition of these institutions. According to that ideal, biblical patriarchy should be replaced by the "all one in Christ Jesus" proclamation of which says "There is no Jew nor Greek, slave nor free, male nor female. For you are all one in Christ Jesus."