Hernán Iván Arias Durán (né Padilla; born 8 August 1958), often referred to as El Negro, is a Bolivian journalist, political analyst, politician, and sociologist serving as mayor of La Paz since 2021. A member of the For the Common Good , of which he is the leader, he previously served as minister of public works from 2019 to 2020 and vice minister of popular participation from 2001 to 2002. A specialist in decentralized public management and indigenous matters, he was the private secretary of Víctor Hugo Cárdenas, the first indigenous vice president, and was part of the team that drafted the Law of Popular Participation, which implemented municipalism in Bolivia through the direct election of local authorities.