Joseph Ber (Yosef Dov) Soloveitchik ( 
1903 - 
1993 ) was an 
Orthodox rabbi, 
Talmudist and modern 
Jewish philosopher .
Over the course of almost half a century he ordained close to 2,000 rabbis who took positions in Orthodox synagogues across America; they were able to relate to their less traditional congregants, drawing them closer to traditional Jewish observance with quite a few becoming religiously observant. He served as an advisor, guide, mentor, and role-model for tens of thousands of Modern Orthodox Jews as their favorite Talmudical Scholar and religious leader.
In the following picture, Rabbi Soloveitchik can be seen at the extreme right, pointing up, giving a class in Talmud :
Rabbi Soloveitchik inherited his father's, Rabbi Moses (Moshe), position as head of the RIETS[?] rabbinical school at Yeshiva University in 1941 . Scion of the famous Soloveitchik Lithuanian rabbinical dynasty going back some 200 years. Grandson of the renowned rabbinical scholar Rabbi Chaim Soloveitchik[?] , and grandson as well as name-sake, of his great grand-father Rabbi Yoshe Ber Soloveitchik known for his work as the Bais HaLevi on Talmud .
Rabbi Joseph Ber Soloveitchik was educated in the traditional manner at a Talmud Torah , an elementary 
yeshiva ,and by private tutors as his parents realized his great mental powers. Soon after marriage to Tonya, he moved to Berlin in Germany where he remained for almost a decade studying at the University of Berlin obtaining a Ph.D. based on the 
philosophy of the great German philosopher 
Herman Cohen[?] , and simultaneously maintaining a rigorous schedule of intensive 
Talmud study. During his years in Berlin, he made the acquintance of two other young scholars pursuing similar paths to his own. One was Rabbi 
Menachem Mendel Schneerson who was destined to command the 
Chabad Lubavitch movement centered in 
Brooklyn , 
New York and the other was Rabbi 
Yitzchok Hutner who would become the Dean of the 
Yeshiva Rabbi Chaim Berlin[?] also in 
Brooklyn , 
New York . Each developed a system of thought bthat bridged the 
Eastern European way of traditional scholarship with the new forces of 
modernity in the the 
Western World . 
During his tenure at Yeshiva University in addition to his Talmudic lectures, he deepened the  system of "synthesis" whereby the best of religious Torah scholarship would be combined with the best secular scholarship in Western civilization. This has become known as the 
Torah Umada - "Torah and 
Science " philosophy unique to Yeshiva University. He authored a book on Jewish thought called "The Lonely Man of Faith" that has somehow been associated with his own stance on issues, the willingness to stand alone in the face of monumental challenges. Through public lectures, writings, and his policy decisions for the moderate 
Modern Orthodox world, he strengthened  the intellectual and ideoligical framework of Modern Orthodoxy.
In his early career in America he joined with the traditional movements such as 
Agudath Israel of America and the 
Agudat Harabanim - the 
Union of Orthodox Rabbis[?] of North America. However as he became entrenched in the Modern Orthodox outlook, he removed himself from the former organizations, and instead joined with the 
Mizrachi Religious Zionists[?] of America (RZA) and the centrist 
Orthodox Rabbinical Council of America[?] (RCA), where many of his students were to be found in leadership positions. Whilst he was bound scholastically and through family connections to the more 
Haredi Agudath Israel group, his world-view had placed itself at the center of 
Modern Orthodox Judaism , with its stress on excellence in secular studies,the professions, and active 
Zionism . 
He thus became a "lightning rod" of criticism from two directions: From the "left" he was viewed as being too connected to the 
Old World of 
Europe , whilst for those to the "right" he was seen as legitimizing those wanting to lower their religious standards in the attempt to 
modernize and 
Americanize .  He was staunchly proud of his connections to the Soloveitchik rabbinic dynasty, speaking fondly of his "uncles" and chiding them from time to time in public. To his relatives and namesakes who now lived in 
Jerusalem where they had established their own branch of the staunchly 
anti-Zionist Brisk[?] Yeshiva, he was respected for his supreme genius in Talmudic scholarship which few could challenege, yet they saw him as their wayward cousin who had departed from the family 
Haredi "party line".
His independence became very clear when in 
1956 , all the major 
Haredi rabbinical heads of the 
Yeshivot , including two from his own 
Yeshiva University signed and issued a proclamation forbidding any rabbinical alumni of their yeshivot from joining with 
Reform Judaism and 
Conservative Judaism rabbis in professional organizations. Rabbi Soloveitchik refused to sign it outright, miantaining that there were areas , particularly relating to problems that threaten all of 
Judaism, that required co-operation regardless of affiliation.
Since he was accepted  as the pre-eminent leader of politically conscious  pro-Zionist modern Orthodox Judaism, out of respect for this, many leaders and politicians from 
Israel sought his advice and blessings in state affairs. He was reputedly offered the position of 
Chief Rabbi of Israel[?] , such as by Prime Minister 
Menachem Begin , but he quietly and consistently refused this offer. Ironically, despite his open and passionate love for the modern 
State of Israel ,yet, he never visited the land.Perhaps because the name Soloveitchik meant something entirely different in Israel than it does in America.  
He unfailinglingly captured the adoration of his students. He was known as the "Rav", he became the greatest leader of Modern Orthodoxy in the twentieth century, often espousing relatively very liberal positions on educational, political, and social issues within the Orthodox world. His ordination of over 2000 Orthodox rabbis at Yeshiva University, during forty years at the helm, attests to his power and efficacy as well as his consistency and determination. 
He would refer to himself as "The Soloveitchik of Boston".He pioneered one of the first Hebrew day schools in 
Boston in 
1936 where he originally intended to settle and resided there  when not teaching in New York. He involved himself in all manner of religious issues in the Boston area. He was at times both a rabbinical supervisor of 
kosher slaughtering - 
shchita- and gladly accepted invitations to lecture in Jewish and religious philosophy at prestigious 
New England colleges and universities. His own son-in-law was on the faculty of 
Harvard .
Not satisfied that young Orthodox women were granted the opportunity to study at their own academic college (Stern College of Yeshiva University) ,he advocated more intensive textual 
Torah studies for Jewish women, giving the first class in Talmud inuagurated at 
Stern College[?], the women's division of Yeshiva College - University. 
With his enlightened outlook, he attracted and inspired many young men to become rabbis and educators, together with their wives coming with similar education and values .They in turn went out with the education of Yeshiva University to head synagogues, schools and communities, where they influenced many Jews to remain Orthodox.He attracted many others to the cause of Orthodoxy. Among his alumni are Rabbis 
Nachman Bulman[?], 
Shlomo  Riskin[?], and 
Ephraim Buchwald[?] and many others who became leaders of the 
Baal teshuva movement.
His children married prominent academics and Tulmudic scholars, one to Rabbi Dr. Aaron Lichtenstein Dean of Gush Etziyon Yeshiva in Israel (with a PhD from Columbia University), another to the late Rabbi Dr. Isadore Twersky former head of the Jewish Studies department at 
Harvard University (also served as the 
Talner  Rebbe in 
Boston ) , and his son Rabbi Dr. Haim Soloveitchik is a professor of Jewish History at Yeshiva University.His granchildren have maintained his heritage and also hold high scholarly positions. 
As he got older he suffered several bouts of serious illness. Family members cared for his every need and distinguished people  came to visit him in his last years in Boston, where in 
1993 he was laid to rest at the age of ninety.