The title of this book involves a play on words. Albert Einstein and Stephen Hawking both spent a lifetime working on what is called a "unified field theory," or in popular parlance, "a theory of everything." The author of Oneness attempts to come up with a "theology of everything." Throughout this process he defines theology not as "the study of God" but as "the study of ultimate reality." There are two scientific areas of study that provide the bedrock for his ideas: "biological evolution" and "cosmic evolution." He attempts to explore "Oneness" from four different angles, or four different perspectives: "the Oneness of life on planet Earth," "the Oneness of human being," "the Oneness of the universe," and "the Oneness of planet Earth."