The 1970s was a time when “architectural theory” was widely discussed and published. Leading historian of architectural theory, Professor Harry F. Mallgrave, writes an essay on the discourses that were particularly important and the architecture connected to them, while also taking into account aspects of the cultural and social background of that era. This entire issue is made up of relevant works of architecture and discourses laid out with reference to the three topics that Professor Mallgrave outlines in his essay – The Presumed Crisis of Meaning, The Real Crisis of Urban Theory, and The First Stirrings of the Ecology Movement, Both Natural and Human. Finally, the editorial team added examples related to the topic of The Vernacular and the Language of Modernism. The result is a cross-section of the 1970s: an era that was neither the “best” nor the “worst” of times.Text in English and Japanese.