The novelist Ricardo Piglia talks about the work of the Argentine artist Roberto Jacoby, in connection with the exhibition Roberto Jacoby, Desire rises from Collapse (Museo Reina Sofía, 25 February to 30 May, 2011). Jacoby's work, explains Piglia, contributes to the formation of two of today's key ideas: the creation of networks, through what Jacoby calls technologies of friendship, and the notion of immateriality as a fundamental aspect of contemporary society.