In the 1950s, the Young Presidents' Organization hired facilitators from the National Training Laboratories to run T-groups -- encounter-style sensitivity training rooted in the work of social psychologist Kurt Lewin. T-groups were the most influential group technology of the mid-twentieth century. Carl Rogers called them "the most significant social invention of the century." They were also volatile. Participants confronted each other directly, challenged defenses in real time, and sometimes broke down. (Batista, "A Brief History of T-Groups," 2013)

YPO stopped using T-groups by the mid-1960s. The precipitating event, according to internal accounts, was a participant having a nervous breakdown. The organization needed the depth these groups provided -- executives were hungry for a space where they could be honest -- but the confrontation model was too dangerous.

The invention of the modern forum

The solution came in 1975 when "Jiggs" Davis and Fred Chaney created a structure that preserved the emotional depth of encounter groups while eliminating direct confrontation. Their design introduced the core elements still used today: small groups of 8-10 peers, strict confidentiality, experience sharing instead of advice, and a trained facilitator. The key innovation was replacing confrontation with what became known as the experience-sharing protocol -- members could only speak from their own experience, never prescribe or evaluate. (ForumSpace, "Forum: From Six to a Billion," 2022)

This was a profound structural insight. Confrontation creates resistance. Experience sharing creates identification. When someone says "here's what I went through," the listener's defenses drop in ways they never do when someone says "here's what you should do."

The Four-Step arrives

The methodology continued evolving. In 2014, YPO introduced the Four-Step Forum Exploration, influenced by Shirzad Chamine's Positive Intelligence framework. The four steps -- presenting, probing, sharing experiences, and developing options -- formalized what the best forum groups had been doing intuitively: moving from story to exploration to collective wisdom without collapsing into advice-giving.

The history of forum is a history of calibrating a dial. Too much safety and nothing happens. Too much intensity and people break. The modern forum sits in the narrow band where the dial is set precisely high enough to be transformative and precisely low enough to be sustainable -- month after month, year after year.

Batista, E. (2013). "A Brief History of T-Groups." edbatista.com.

ForumSpace. (2022). "Forum: From Six to a Billion." forumspace.com.

McNees, P. (1999). YPO: The First 50 Years. Orange Frazer Press.

Chamine, S. (2012). Positive Intelligence. Greenleaf Book Group.

Lewin, K. (1947). "Frontiers in Group Dynamics." Human Relations, 1(1).