Louis Jacobs (17 July 1920, Manchester – 1 July 2006, London) was the founder of Masorti Judaism (also known as Conservative Judaism) in the United Kingdom, and a leading writer and theologian. He was also the focus of what has become known as "The Jacobs Affair" that took place in the British Jewish community in the early 1960s.
 Early career
Jacobs studied at Manchester Yeshivah, and later at the kolel in Gateshead. His teachers included leading Rabbi Eliyahu Dessler. Jacobs was ordained as a rabbi at Manchester Yeshivah. Later in his career he studied at University College London where he gained his PhD on the topic of The Business Life of the Jews in Babylon, 200-500 BCE. Jacobs was appointed rabbi at Manchester Central Synagogue in 1948. In 1954 he was appointed to the New West End Synagogue in London.
Jacobs became Moral Tutor at Jews' College, London, where he taught Talmud and homiletics during the last years of Rabbi Dr. Isidore Epstein's tenure as principal. By this time Jacobs had drifted away from the strictly traditional approach to Jewish theology that had marked his formative years. Instead he struggled to find a synthesis that would accommodate Orthodox Jewish theology and modern day higher biblical criticism. Jacobs was especially concerned with how to reconcile modern day Orthodox Jewish faith with the Documentary Hypothesis. His ideas about the subject were published in the book, We Have Reason to Believe, in 1957. The book was originally written to record the essence of discussions held on its title's subject at weekly classes given by Jacobs at the New West End Synagogue and was the subject at the time of some mild criticism, but not of any major censure.
 We Have Reason to Believe
Most of Jacobs’s book We Have Reason to Believe deals with such topics as proof of God’s existence, pain, miracles, the after-life, and the idea of a ‘Chosen People’, ideas which were not in themselves controversial. Debate on the book was eventually to centre on chapters 6, 7, and 8: The Torah and Modern Criticism, A Synthesis of the Traditional and Critical Views and Bible Difficulties.
In these chapters Jacobs took on discussion of ‘Modern Criticism’ of the Bible, more specifically textual analysis of the Torah known as the ‘Documentary Hypothesis’, which suggests that its texts derives from multiple sources, rather than having been given, as Orthodox Rabbinical traditions have it, complete in its present form by God to Moses during the period beginning on Mount Sinai and ending with Moses's death.
Jacobs comments: 'While Judaism stands or falls on the belief in revelation, there is no ‘official’ interpretation on the way in which God spoke to man'. He points out that ‘according to some Rabbis, [the Pentateuch] was given to Moses at intervals during the sojourn in the Wilderness’. But he also points out that given the arguments of textual criticism ‘no work of Jewish apologetics, however limited in scope, can afford to fight shy of the problem’. Here there is an implied rebuke of the tendency of many Jewish authorities of the period simply to gloss over the inconveniences of the thoughts of the ‘modern critics’ – a rebuke which perhaps rankled with some.
Jacobs concludes ‘there is nothing to deter the faithful Jew from accepting the principle of textual criticism’. He is aware that ‘to talk about ‘reconciling’ the Maimonidean idea and the Documentary Hypothesis […] is futile, for you cannot reconcile two contradictory theories. But to say this is not to preclude the possibility of a synthesis between the old knowledge and the new knowledge’.
Jacobs provides numerous examples from the Talmud and from other rabbinical writings indicating acceptance of the idea of Divine intervention in human affairs, with ‘God revealing his Will not alone to men but through men’. He concludes that, even if the Documentary Hypothesis is partly (or even entirely) correct,
God’s power is not lessened because He preferred to co-operate with His creatures in producing the Book of Books […] We hear the authentic voice of God speaking to us through the pages of the Bible […] and its message is in no way affected in that we can only hear that voice through the medium of human beings.
 The "Jacobs Affair"
It had been widely assumed that after Epstein's retirement as principal of Jews' College he would be succeeded by Jacobs. When this assumption was translated into a definite invitation by the College's Board of Trustees in 1961, the then Chief Rabbi of the United Kingdom, Israel Brodie, interdicted the appointment "because of his [Jacobs's] published views". This was a reference to We Have Reason to Believe.
The British newspaper, The Jewish Chronicle, took up the issue and turned it into a cause célèbre which was reported in the national press, including The Times. When Jacobs wished to return to his pulpit at the New West End Synagogue Brodie vetoed his appointment. A number of members then left the New West End Synagogue to found the New London Synagogue.
 The New London Synagogue
The defecting congregation purchased the old St. John's Wood synagogue building, and installed Jacobs as its rabbi — a post which he held until 2000 and to which he returned in 2005. This congregation, The New London Synagogue, became the "parent" of the Masorti movement in the United Kingdom, which now numbers several congregations.
While holding the position of Rabbi at the New London Synagogue, Dr. Jacobs was also for many years Lecturer in Talmud and Zohar at the Leo Baeck College, a rabbinical college preparing students to serve as Masorti, Reform and Liberal rabbis in the UK and Europe. Rabbi Jacobs served as Chairman of the Academic Committee for some years.
Since the founding of the New London Synagogue, Jacobs and the Masorti movement were subject to hostility from Orthodox British Jewish institutions. On his 83rd birthday, in the Bournemouth United Synagogue on the sabbath before his granddaughter's wedding, Jacobs was not provided the honour of an aliyah customarily given to the father of the bride, which gave rise to heated correspondence in the Jewish press including accusations of pettiness and vindictiveness. The Chief Rabbi, Sir Jonathan Sacks, and the head of the London Beth Din, Dayan Chanoch Ehrentreu, responded that, because of what they considered to be Jacobs's heretical beliefs, "they believed that had Jacobs uttered the words 'Our God […] who gave us the Torah of truth […] ', he would have made a false statement".
In December 2005, a poll by The Jewish Chronicle of its subscribers, in which 2,000 readers made their nominations, voted Jacobs the 'greatest British Jew' in the community's 350-year history in England. Jacobs commented "I feel greatly honoured - and rather daft." Nevertheless, reports that Louis Jacobs had been nominated greatest British Jew, received wide press coverage in Britain.
A few months before his death he donated his great book collection to the Leopold Muller Memorial Library at the Oxford Centre for Hebrew and Jewish Studies.
 Selected publications
- Jewish Prayer
- We Have Reason to Believe (1957, revised editions in 1961 and 1965)
- Jewish Values
- Jewish Thought Today (Chain of Tradition Series, Vol. 3)
- Studies in Talmudic Logic (and Methodology) (1961)
- A Jewish Theology
- Jewish Ethics, Philosophy and Mysticism
- The Book of Jewish Belief
- What does Judaism say about ...? (The New York Times Library of Jewish Knowledge)
- The Jewish Religion: A Companion, (1995), Oxford University Press, ISBN 0-19-826463-1
- Turn Aside from Evil and Do Good: An Introduction and a Way to the Tree of Life, (1995), The Littman Library of Jewish Civilization, ISBN 1-874774-10-2(c); ISBN 1-877774-11-0(p)(author = Zevi Hirsch Eichenstein, translation by Louis Jacobs)
 Louis Jacobs online
Two websites exist with information about Jacobs's writings and thought, and to provide a forum for discussion of his ideas:
- Jacobs, Louis. Helping With Inquiries (autobiography) (1989) ISBN 0-85303-231-9
- Jacobs, Louis. We have Reason to Believe (3rd edition). Valentine, Mitchell: London (1965)
- Obituaries (see below)
 Further reading
- Elliot J. Cosgrove (2008), "Teyku: The Insoluble Contradictions in the Life and Thought of Louis Jacobs", vol 1, vol 2, PhD Thesis, University of Chicago.
- Raymond Apple Kovno & Oxford: Israel Brodie & his rabbinical career
- Obituary The Times, July 4, 2006
- Obituary The Guardian, July 5, 2006
- Obituary The Forward (New York), 7 July 2006
- Obituary The Independent, 11 July 2006
- Obituary The Daily Telegraph, July 15, 2006
- Obituaries and tributes, New London Synagogue