Engel's In-troduction is an effective weapon in carrying out criticisms of the decadent idealistic-metaphysical viewpoints in contemporary cosmogonical researeh.
In order to maintain thoroughly hsi philosophical standpoint of Anti-realism, he rejected two-valued semantics and took Intuitionist logic as the basis of his metaphysics.
Coherent with his metaphysics is his idea at survival clearance, which deepens self consciousness in both atomology and monadism from the angle at survival philosophy.