Obviously, each of us exists in three-dimensional, physical space. But, as a constellation of everyday digital phenomena rewires our lives, we are increasingly coaxed into a wonderful and eerie fourth dimension, a world of ceaseless communication, instant information, and global connection. Laurence Scott is author of the new book, The Four-Dimensional Human: Ways of Being in the Digital World. His essays and criticism have appeared in the Guardian, the Financial Times, and the London Review of Books, among other publications.