Templeton World Charity Foundation funded the largest-ever randomized control trial of a forgiveness intervention, involving thousands of participants from locations with a history of conflict — Colombia, Indonesia, Hong Kong, South Africa, and Ukraine. Professor Everett Worthington is one of the world's leading researchers on forgiveness. His REACH Forgiveness workbook is at the center of the study. The REACH model is a scientifically validated tool that provides a step-by-step process to reach forgiveness. The workbook is secular and free-of-cost, and is now available for download in multiple languages. It was designed to be completed independently in 2-3 hours. The study found that those who followed the workbook showed significant reductions in unforgiveness, depression symptoms, and anxiety symptoms, compared to a group who was delayed in receipt of the workbook.