Reflections on the past, present and future of condensed matter physics

I consider some of the ways in which the practice and even the definition of "condensed-matter physics" has evolved since its inception in the early twentieth century, with particular reference to its relationship to neighboring and even distant disciplines. I speculate on some possible directions in which the discipline may develop over the next few decades, emphasizing that there are still some very basic questions to which we currently have no satisfactory answers.