In this paper I attempt to introduce a novel trend of fundamental thinking - Metanaturalism. This area assumes the integration of a posteriory and priory knowledge and thus presupposes the achievement of the level of universal knowledge about the world of Earth's life. The other necessary predisposition for the achievement of universal knowledge is the introducing of the novel trend of Cosmist Dualism, which is differentiated from Cartesian dualism. On this basis, the metanaturalistic notions of "Process" and of the triune essence of human nature are advanced. In outcome, I deduce two principal corollaries that a) exclusively subjective (personalist) level of consideration is appropriate for universal comprehension of living things on Earth, and b) exclusively cosmist functional systemic approach might reach the universal comprehension of the life phenomena on Earth - biological, personal, societal. In completion of the work, I conduct a short historical analysis of analogous (to Cosmist philosophy) attempts in world science and draw a conclusion that the universal systemic organising of sciences has an urgent significance for the future wellbeing of man and world. Significantly, we already possess the scientific means for this universal systemic approach and, at present, just need to create the proper methodological foundations for this great advance.