What are the differences between religions and cultures around the world? Elda Hartley, film producer and author of Perennial Wisdom, discusses the commonality between the world’s religions and holistic health.Elda Hartley’s films about world religion, cultures, holistic health and new medicine have received numerous awards. In this interview, Hartley discusses her experience making films and her beliefs about religion, spirituality and an integrated approach to health care. At a vital 86, Hartley enjoys spreading her positive energy and wisdom.