The other day, I was taking the metro in Barcelona. As I stepped into a crowded carriage, a woman entered just beside me. She had a severe deformation in her back that made walking difficult, and she moved slowly and carefully through the people around us. Almost instinctively, I looked towards the seats. I thought: surely someone will stand up. But nobody did. Most of the people sitting there were looking at their phones, endlessly scrolling through images, stories, messages