Book excerpt: On photography's role in social communication, from early analog film to social media Photography has always been a social medium shared with others. But why do we communicate with each other using images? This publication explores the development of photography from a means of communication in the 19th century to its current digital representation online. Artists include: ABC Artists' Books Cooperative, Adam Broomberg & Oliver Chanarin with Der Greif, David Campany & Anastasia Samoylova, Fredi Casco, Moyra Davey, Themistokles von Eckenbrecher, Martin Fengel & Jörg Koopmann, Stuart Franklin, Gilbert & George, Dieter Hacker, Tomas van Houtryve, Philippe Kahn, On Kawara, Erik Kessels, Marc Lee, Lynn Hershman Leeson, Mike Mandel, Theresa Martinat, Eva & Franco Mattes, Jonas Meyer & Christin Müller, Peter Miller, Romain Roucoules, Thomas Ruff, Taryn Simon & Aaron Swartz, Andreas Slominski, Clare Strand and Corinne Vionnet.