Ralph Waldo Trine (1866–1958) was an American New Thought philosopher, writer, and animal welfare activist whose work helped shape the modern self-improvement tradition. Born in Mount Morris, Illinois, Trine was deeply influenced by Ralph Waldo Emerson's transcendentalism and studied history and political science at Johns Hopkins University before earning his A.M. from Knox College in 1893. His early years as a correspondent for the Boston Evening Transcript sharpened his prose style, even as his spiritual thinking drew from a rich synthesis of Buddhism, pantheism, and neo-Vedanta traditions.
In 1897, Trine published In Tune with the Infinite, a landmark text that became the most widely read work in the New Thought movement—ultimately translated into 20 languages and selling millions of copies worldwide. The book articulates Trine's core conviction that aligning oneself with universal spiritual forces produces lasting inner peace, vibrant health, and genuine success. Unlike some contemporaries who emphasized material prosperity, Trine stressed moral character, faith, and positive thinking as the true foundations of a fulfilling life. His message resonated with readers across generations, and In Tune with the Infinite remains in print more than a century after its first publication.
Beyond his philosophical writing, Trine was a committed animal welfare advocate who served as director of both the American Humane Education Society and the Massachusetts Society for the Prevention of Cruelty to Animals. A lifelong vegetarian on ethical grounds, he wrote Every Living Creature to champion kindness toward animals and plant-based living. Trine lived to the remarkable age of 91, spending his final decades in Claremont, California, leaving behind a legacy that continues to inspire readers seeking harmony between the inner life and the outer world.
