Olli Pyyhtinen is Professor of Sociology at the University of Tampere, Finland. He is the author of Simmel and 'the Social' (Palgrave Macmillan, 2010), The Gift and its Paradoxes (2014), and Disruptive Tourism and its Untidy Guests: Alternative Ontologies for Future Hospitalities (Palgrave Macmillan, 2014, with Veijola et al).