Felix Adler, founder of the Ethical Culture movement[1].
The record places him at the 1893 Parliament on the World's Religions, on a panel asking whether Christianity was losing ground.
The Parliament was chaired by Paul Carus, who was a freemason. Adler contributed to the same panel as Carus. The record notes the freemason link as a personal association only, and says it does not show any institutional, funding, or membership tie between them. The record also says Adler's founding role does not give him any institutional command over Carus or The Open Court. A cited document says Adler laid the foundations for what became organised humanism.
It shows a founder of organised humanism working inside a Christian question, alongside a freemason, while the record itself warns against reading those links as control.