Psychedelics have been used for thousands of years but in a provocative new book “The Immortality Key” author Brian Muraresku explores their impact on early Western civilization. Were the ancient Greeks, Romans and early Chrisitians influenced in their religious practices by psychedelics? Psilocybin, known by many as magic mushrooms, is being used to treat an array of mental disorders, from anxiety and depression to addiction and end of life issues with profound effects for patients. Today, the medical community is once again embracing research into the therapeutic benefits of hallucinogens.