Question: The Unitarian Church of All Souls, which was built in 1932, was the first congregation of its kind in the city and are unified by their search for what?

Context paragraphs:
Unitarian Universalist Church of Arlington: Unitarian Universalist Church of Arlington (UUCA), historically known as the Unitarian Church of Arlington, is a Unitarian Universalist church located at 4444 Arlington Boulevard (U.S. 50) in Arlington County, Virginia.  Founded in 1948, UUCA was the first Unitarian church in Washington, D.C.'s suburbs.  Throughout its history, UUCA has taken part in progressive causes from the Civil Rights Movement to the legalization of same-sex marriage in Virginia.  During the Civil Rights Movement, UUCA was the only Virginia church to speak out in favor of racial integration.  UUCA's sanctuary building, designed by local architect Charles M. Goodman in 1964, is a concrete Brutalist structure that was listed on the National Register of Historic Places and Virginia Landmarks Register in 2014.  It is one of only three church buildings designed by Goodman and the only one in Virginia.

Unitarian Universalism: Unitarian Universalism is a liberal religion characterized by a "free and responsible search for truth and meaning".  The Unitarian Universalist (UU) Church does not have a creed.  Instead, UUs are unified by their shared search for spiritual growth.  As such, UU congregations include many agnostics, theists, and atheists among their membership.  The roots of UU are in liberal Christianity, specifically Unitarianism and Universalism.  Unitarian Universalists state that from these traditions come a deep regard for intellectual freedom and inclusive love.  Congregations and members seek inspiration and derive insight from all major world religions.

Unitarian Church in Charleston: The Unitarian Church in Charleston, home to a Unitarian Universalist congregation, is an historic church located at 4 Archdale Street in Charleston, South Carolina.  It is "the oldest Unitarian church in the South" and is a National Historic Landmark.  It is the second oldest church in downtown Charleston.  Its construction began in 1772 when the "Society of Dissenters" (now known as the Circular Congregational Church) needed more space than its Meeting Street location could provide.  It was nearly complete in 1776 when the Revolutionary War began, finally being repaired and officially dedicated in 1787.

Raymond Bragg: Raymond Bennett Bragg (1902–1979) was an American Unitarian minister who played a key role in the writing of the Humanist Manifesto and eventually signing Humanist Manifesto.  Raymond Bragg was born in Massachusetts and attended Bates College and Brown University.  In 1927, he earned a B.A. in philosophy from the University of Chicago and a B.D. from Meadville Theological School and was ordained at the Unitarian Church of All Souls in Evanston, Illinois where he was pastor until 1930.  From 1930-1935 he served as the Secretary of the Western Unitarian Conference.  During these years he was also the editor of The New Humanist, and was one of the signers of the Humanist Manifesto, which helped give rise to a new humanist movement within Unitarianism.  He served as pastor of the First Unitarian Society of Minneapolis from 1935–1947.  He was the Executive Director of the Unitarian Service Committee from 1947-1952, and then became the pastor of All Souls Unitarian Church, Kansas City, Missouri, where he remained until his retirement in 1973.  During this time, he chaired the Kansas City's Civil Liberties Union, worked on the local and state levels to improve mental health services, and was an assistant professor of philosophy at the Kansas City Art Institute.  Upon his retirement, he was elected Minister Emeritus by the Kansas City congregation.

Unitarian Church of All Souls: The Unitarian Church of All Souls at 1157 Lexington Avenue at East 80th Street in the Upper East Side of Manhattan, New York City was built in 1932 and was designed by Herbert Upjohn – Richard Upjohn's grandson – in the Neo-colonial style with a Regency-influenced brick base.  It is the congregation's fourth sanctuary.  It was the first Unitarian Universalist congregation in the city.  It has provided a pulpit for some of the movement's leading theologians and has also recorded many eminent persons in its membership.

First Unitarian Church (Baltimore, Maryland): The First Unitarian Church is a historic church and congregation at 12 West Franklin Street in Baltimore, Maryland.  Dedicated in 1818, it was the first building erected for Unitarians in the United States.  The church is a domed cube with a stucco exterior.  The church, originally called the "First Independent Church of Baltimore", is the oldest building continuously used by a Unitarian congregation.  The name was changed in 1935 to "The First Unitarian Church of Baltimore (Unitarian and Univeralist)" following the merger with the former Second Universalist Church at East Lanvale Street and Guilford Avenue in East Baltimore.  The Unitarians (founded 1825) and Universalists merged as a national denomination in 1961.

Federal Street Church (Boston): The Federal Street Church (established 1729) was a congregational unitarian church in Boston, Massachusetts.  Organized in 1727, the originally presbyterian congregation changed in 1786 to "Congregationalism", then adopted the liberal theology of its fifth Senior Minister, William Ellery Channing, (1780-1842).  For most of the 18th century the church was known as the Long Lane Meeting-House.  In 1788, state leaders met in the relatively spacious building to determine Massachusetts' ratification of the United States Constitution.  Thereafter the church renamed itself the Federal Street Church in honor of the event.  In 1803, it called William Ellery Channing, (1780-1842), as its minister who defined "Unitarian Christianity" and launched the Unitarian movement, making the Federal Street Church one of the first to define itself as Unitarian.

Wollaston Unitarian Church: St. Catherine's Greek Orthodox Church, formerly home to the Wollaston Unitarian Church, is a historic church building at 155 Beale Street in Quincy, Massachusetts.  The Shingle style building was built in 1888 for a Unitarian congregation established the previous year.  The Wollaston Church merged with United First Parish Church in Quincy in 1960.  The Beale Street building was purchased for $40,000 by St. Catherine's Greek Orthodox Church of the South Shore.  St. Catherine's grew over the years, and in 2004 the congregation moved to a new building in Braintree.  The building was added to the National Register of Historic Places in 1989

First Unitarian Church in Westport: The Unitarian Church in Westport, nicknamed the New Ship Church, is a striking church building in Westport, Connecticut designed by modernist architect Victor A. Lundy and completed in 1965.  It won an award from Architect magazine.  It has been compared to E. Fay Jones' Thorncrown Chapel (1980) and to the wooden tent Lundy designed for the interior of his Unitarian Meeting House (1964) in Hartford, Connecticut.  The nickname New Ship Church is a reference to the Old Ship Church built in 1681 in Hingham, Massachusetts.  The congregation was founded in 1949 as "The First Unitarian Fellowship of Fairfield County."  http://uuwestport.org/

First Unitarian Church of Hobart: First Unitarian Church of Hobart is the oldest Unitarian Church in Indiana, and the oldest church still occupied by its original congregation in the city of Hobart.  It was added to the National Register of Historic Places on September 9, 1999.

Supporting paragraphs: Unitarian Church of All Souls Unitarian Universalism
Answer: spiritual growth