Early in his career, Wolf served as the minister for Unitarian churches in Racine, Wisconsin and Meadville, Pennsylvania. His Meadville church was the Independent Congregational Church – Unitarian from 1954 until 1960. He also served in several positions of the Unitarian Universalist denomination. In 1960, he was called to serve as Senior Minister of All Souls church in Tulsa. While he served in the latter position, he became a leader of the civil rights movement in Tulsa, and his congregation grew from about 1,000 members in 1960 to about 2,800 by 1968, becoming the largest single UU church in the United States. He also helped stimulate the formation of two more churches in the city: Hope UU Church and Church of the Restoration. Wolf's own church has had to contend with its own tarnished past in race relations. In 1921, the same year as the infamous Tulsa Race Riot, All Souls church was co-founded by Richard Lloyd Jones, editor and publisher of the afternoon newspaper, the Tulsa Tribune. An inflammatory editorial allegedly appeared in the paper reporting an attempted assault of a young white woman by a young black man in the elevator of a downtown building on May 31, 1921. The Tribune article was said to have called for lynching of the man, who had been arrested by the Tulsa County sheriff. When the sheriff refused to turn the prisoner over to an armed mob that night, the frustrated mob members took out their rage on the main residential district of blacks living in Tulsa, burning, looting and killing indiscriminately. White civil and political leaders did nearly nothing to stop the riot until the district was essentially destroyed. Later, the alleged female victim changed her account, the alleged attacker was freed and released for lack of evidence, no one was tried for participating, newspapers of the day disappeared from newsstands and a veritable "cone of silence" descended over the event for nearly four decades. Wolf recalled later that he was cautioned by a member of his church that he should never talk about the riot from his pulpit when he began to expound on race relations. John Wolf was not a person to back down from such a controversy. He knew that continued silence would never heal the city, which had experienced significant damage – even when many of the physical scars had been erased. He demanded action through sermons and actions. By the late 1960s, Wolf had become a spokesman of the city in the eyes of the public and many of his colleagues in the clergy. In 1968, the Tulsa Public School system was floundering on many issues, including integration, and top-heavy management. Wolf became fed up and blamed the mess on the board president, Dr. Charles C. Mason. Finally Wolf preached a sermon titled, "The Last Days of Dr. Mason." The Tulsa World published excerpts in its edition on the following morning. That night the school board held its regular public meeting, which had the largest number of people that had ever come to the school board meeting up to that time. Dr. Wolf was present and acted as the public spokesperson. Before the meeting ended, Dr. Mason publicly resigned his position. Dr. Wolf retired in 1995 as senior minister of All Souls, though he continued to live in Tulsa and remained affiliated with the church as minister emeritus until his death 22 years later.
Activities outside the church
In addition to his pastoral responsibilities, Dr. Wolf gave generously of his time and energies to groups outside the church. Some of these activities included:
According to one obituary, John Wolf was survived by his wife of 65 years, Barbara N. Hudgins Wolf; their son, John David Wolf ; their daughter, Catherine Elizabeth Wolf; grandson, Aaron Michael Wolf-Johnson, and great-granddaughter Willow Rose Wolf-Johnson.
