Orthodox (including the rival Positive-Historical School). The title "Reform" became much more common in the United States, where an independent denomination under this name was fully identified with the religious tendency. However, Isaac Meyer Wise suggested in 1871 that "Progressive Judaism" was a better epithet. When the movement was institutionalized in Germany between 1898 and 1908, its leaders chose "Liberal" as self-designation, founding the Vereinigung für das Liberale Judentum. In 1902, Claude Montefiore termed the doctrine espoused by his new Jewish Religious Union as "Liberal Judaism", too, though it belonged to the more radical part of the spectrum in relation to the German one. In 1926, British Liberals, American Reform and German Liberals consolidated their worldwide movement – united in affirming tenets such as progressive revelation, supremacy of ethics above ritual and so forth – at a meeting held in London. Originally carrying the provisional title "International Conference of Liberal Jews", after deliberations between "Liberal", "Reform" and "Modern", it was named World Union for Progressive Judaism on 12 July, at the conclusion of a vote. The WUPJ established further branches around the planet, alternatively under the names "Reform", "Liberal" and "Progressive". In 1945, the Associated British Synagogues (later Movement for Reform Judaism) joined as well. In 1990, Reconstructionist Judaism entered the WUPJ as an observer. Espousing another religious worldview, it became the only non-Reform member. The WUPJ claims to represent a total of at least 1.8 million people – these figures do not take into account the 2013 PEW survey, and rely on the older URJ estimate of a total of 1.5 million presumed to have affinity, since updated to 2.2 million – both registered synagogue members and non-affiliates who identify with it. Worldwide, the movement is mainly centered in North America. The largest WUPJ constituent by far is the Union for Reform Judaism (until 2003: Union of American Hebrew Congregations) in the United States and Canada. As of 2013, the Pew Research Center survey calculated it represented about 35% of all 5.3 million Jewish adults in the U.S., making it the single most numerous Jewish religious group in the country. Steven M. Cohen deduced there were 756,000 adult Jewish synagogue members – about a quarter of households had an unconverted spouse (according to 2001 findings), adding some 90,000 non-Jews and making the total constituency roughly 850,000 – and further 1,154,000 "Reform-identified non-members" in the United States. There are also