<p>In a series of vibrant and lively essays, Steffen Hartmann focuses on a little-known but critically important theme relating to the teachings of Rudolf Steiner. Steiner described the collaboration between human souls connected to the Platonic and Aristotelian 'schools' or groupings ? both here on Earth and in the spiritual world. These groupings of souls work within a wider metaphysical collective known as the 'Michael School', led by the ruli...