Despite the fact that science has collected a great deal of information on different soils, their qualities, composition, and geography the question of why soil exists and what its main function is remains in dispute. Often it is argued that soil exists to supply plants with water and nutrients and to protect the lithosphere against erosion. Applied agronomists and extensionists frequently maintain in agricultural literature that soil exists to provide the necessary conditions for farming; fertility is considered a basic function. Even though fertility is important, we consider the primary reason for soils existence is to support life on Earth. We know, or are at least familiar with, many theories, hypotheses, and versions about creation of life. All of them, including the Bible and Darwin's Theory of Evolution, hold that soil appeared prior to man and simultaneously with the appearance of life on Earth. The simultaneous occurrence of these two significant processes defines their character and the function of each of them. The fact that soil appeared at the same time as life, suggests it is an essential condition for existence, renewal, and continuation of life. Soil dissolves organic residues remaining when organisms die and changes them so that they can be used by new life. This function converts organic residues on the surface of the globe so their elements are available. By liberating “building materials” from organic remains, elements necessary for continuation of the life cycle, development, and renewal are available. We call this property re-utilization and consider it a priority for the appearance and existence of soil in nature and therefore its main function. Soil is the result of life and at the same time exists as an indispensable condition for life on Earth.