Ethics as the Enduring Core

The principle rests on Reform's conviction that Judaism is a developing faith whose prophetic ethics are its permanent essence, and on a respect for the modern autonomous conscience. It distinguishes Reform sharply from Orthodox and Conservative Judaism, both of which hold the law binding in some form, and it explains the movement's openness on questions of ritual, gender, and inclusion. The belief presents observance as a matter of meaning and personal decision rather than of commanded duty.

The practical stakes of Reform's approach to ceremonial law were dramatised at the so-called trefa banquet in Cincinnati in 1883, a celebratory dinner marking the first ordination class of Hebrew Union College at which shellfish and other non-kosher foods were served to an audience that included traditionalist rabbis; the resulting outrage was a direct catalyst for the split that produced the more traditionally observant Conservative movement, whose flagship institution, the Jewish Theological Seminary, was reorganised in 1886 and 1887 partly in reaction against the direction Reform had taken. The episode is often cited as the moment the boundary between Reform's autonomy principle and Conservative Judaism's commitment to a modernised but binding halakha became institutionally permanent.