Paul Leendertse is the pioneer of the Root Cause work and author of The Root Cause of Cancer. He has over 18 years of experience working closely with individuals navigating significant health challenges, including many with stage 3 and stage 4 cancer.

Over a 10-year period, Paul explored cancer in an unusually intensive way - living and working with individuals with cancer for three weeks at a time while examining their life experiences, emotional stress, trauma, relationships, behaviours, lifestyle factors, and significant life challenges.

Through this work, Paul repeatedly observed patterns of unresolved emotional stress, trauma, and significant life challenges in the years preceding his clients’ cancer diagnoses. These observations led him to develop his theory of a psycho-emotional stress complex and what has since become the Root Cause framework - an educational approach for exploring the emotional, psychological, behavioural, relationship, and spiritual dimensions of cancer, health, and healing.

Paul went on to develop a clear methodology for Healing From Within, drawing upon his experiences working with clients at his Healing From Within Retreat in Canada and through years of individual Root Cause work. His approach focuses on helping individuals identify and work through significant psycho-emotional patterns and life challenges, reconnect with themselves, and create meaningful inner healing and personal transformation.

In 2021, Paul and Aria founded Root Cause Institute and began teaching this work online. Level 2 brings together their most advanced education, methods, and practical tools for students ready to deepen their knowledge and skills in Root Cause Healing.