This work presents and philosophically analyzes the early modern and modern history of the theory concerning the soul of the world, anima mundi. The initial question of the investigation is why there was a revival of this theory in the time of the early German Romanticism, whereas the concept of the anima mundi had been rejected in the earlier, classical period of European philosophy (early and mature Enlightenment). The presentation and analysis starts from the Leibnizian-Wolffian school, generally hostile to the theory, and covers classical eighteenth-century physico-theology, also reluctant to accept an anima mundi. Next, it discusses early modern and modern Christian philosophical Cabbala (Boehme and OEtinger), an intellectual tradition which to some extent tolerated the idea of a soul of the world. The philosophical relationship between Spinoza and Spinozism on the one hand, and the anima mundi theory on the other is also examined. An analysis of Giordano Bruno's utilization of the concept anima del mondo is the last step before we give an account of how and why German Romanticism, especially Baader and Schelling asserted and applied the theory of the Weltseele. The purpose of the work is to prove that the philosophical insufficiency of a concept of God as an ens extramundanum instigated the Romantics to think an anima mundi that can act as a divine and quasi-infinite intermediary between God and Nature, as a locum tenens of God in physical reality.