Born in Spencer, Indiana. Would become the central figure in the transmission of The Urantia Book.

Dr. Sadler and wife Lena encounter the "sleeping subject" whose unconscious communications would become the basis for the Urantia Papers.

Dr. Sadler organizes a group of 30 people at 533 Diversey Parkway, Chicago, to discuss the papers being received.

Over a decade, 196 papers are received through the contact commission. Forum members submit questions that shape the content.

Part IV (The Life and Teachings of Jesus) received. All 2,097 pages of the manuscript are now complete.

Foundation created to publish, protect, and disseminate The Urantia Book. Declaration of Trust signed January 11.

First edition: 10,000 copies printed by R.R. Donnelley & Sons. Price: $10. Published October 12.

First Urantia Society of Chicago chartered, the first official reader organization.

Emma "Christy" Christensen becomes President of Urantia Foundation after Sadler steps back.

William S. Sadler passes at age 94. Dedicated over 60 years to the revelation.

Urantia Brotherhood (later renamed "The Fellowship") separates from Urantia Foundation over governance and copyright disputes.

Foundation sues Kristen Maaherra for distributing digital copies. Begins decade of legal battles over copyright.

Urantia Association International founded by Foundation as alternative to the Fellowship.

U.S. court rules the copyright on The Urantia Book is invalid. Text enters public domain.

Digital study groups, mailing lists, and early web communities begin growing the readership globally.

New tools make the revelation more accessible than ever: full-text search, cinematic production, interactive maps.

UBN goes live with Listen, Map, Archive, Library, and gamified study tools. Independent. Research-driven. Community-first.