The social revolt that exploded into violence in Chile 20 days ago has brought old social, economic and political demands back onto the table. One of those is to replace the current constitution, which dates from the 1973-1990 dictatorship of Augusto Pinochet. The current constitution limits the issues that can be put to a referendum, and whether to replace it is not on the approved list. Experts say this clause could be changed by Congress to open the door to a plebiscite. Lecturer in Politics, Dr Javier Sajuria, a Chilean and senior politics lecturer at Queen Mary University of London, said citizens should vote on a "concrete proposal, not a vague idea." He added: "If you don't believe me, look at Brexit."Find out more Also featured in: Reuters