 The “place of absolute nothingess” (zettai-mu no basho) first became the central concept of Nishida’s thought in the mid-1920s, though he continued to develop and rethink the idea up until his last completed essay in 1945, “The Logic of Place and the Religious World-View.” Nishida first explicitly worked out an idea of absolute nothingness in his 1926 book, From That Which Acts to That Which Sees (NKZ IV), a book which inaugurated his middle-period of thought. In this work, which includes an important essay entitled “Place” (“Basho”), Nishida’s topological reasoning develops in rough outline as  follows[11]: