For more than fifty years, Dr. Cahill has been helping to heal the world, as a leading specialist in tropical medicine and as a driving force in humanitarian assistance and relief efforts around the globe. In this revised and expanded edition, he chronicles extraordinary achievements of compassion and commitment. Bringing together a rich selection of writings, he crafts a fascinating memoir of a life devoted to others. The book includes front-line reports from places under siege—Lebanon, Somalia, Sudan, Nicaragua, Gaza, and Ireland; there are also visionary essays from the origins of the AIDS epidemic and landmine crises, and no less passionate concerns of his own experiences of pain and suffering—as well as of joy and beauty—in the worlds in which he has traveled. As the distinguished neurologist and author Oliver Sacks, M.D., notes in his endorsement, “These essays, by turns elegiac, lyrical, funny, tender, nostalgic, and vehemently impassioned, come together in an ongoing tapestry, a portrait of a dedicated physician who has dared to make a difference.”