
Daniel Harold Casriel was an American psychiatrist, psychoanalyst and writer from New York City. Dan Casriel's method of group psychotherapy is continued today. His novel road map to happiness evolved into a framework for the field of relationship education as the PAIRS' relationship roadmap for couples. Dr. Casriel also founded the Daytop treatment centers, which were strongly inspired by the psychotherapy cult Synanon.

Gary Demonte Chapman is an American author and radio talk show host. Chapman is most noted for his The Five Love Languages series regarding human relationships.

John Gray is an American relationship counselor, lecturer and author. In 1969, he began a nine-year association with Maharishi Mahesh Yogi before beginning his career as an author and personal relationship counselor. In 1992 he published the book Men Are from Mars, Women Are from Venus, which became a long-term best seller and formed the central theme of all his subsequent books and career activities. His books have sold millions of copies.

Helen LaKelly Hunt is an American, activist, feminist, philanthropist and writer. The daughter of H. L. Hunt, she grew up in Dallas, Texas. After graduating from the Hockaday School and Southern Methodist University, she earned a master's degree in clinical psychology and a Ph.D. in church history.

Paul Jeffrey Ross, known by the pseudonym Ross Jeffries, is an American author and pick-up artist.

Anthony Jay Robbins is an American author, coach, speaker, and philanthropist. Robbins is known for his infomercials, seminars, and self-help books including the books Unlimited Power and Awaken the Giant Within. His seminars are organized through Robbins Research International.

Peggy Vaughan was an American author and speaker on infidelity issues.

Michele Weiner-Davis is a licensed clinical social worker, marriage and family therapist and author in the field of family therapy. She is frequently quoted in the media and has been interviewed on television news programs regarding divorce prevention. Weiner-Davis has often been referred to as The Divorce Buster after coining the term “divorce busting” at an American Association for Marriage and Family Therapy conference in 1989. She currently writes a regular column, Divorce Busting: Musings From an Unabashed Marriage Saver in Psychology Today.