Spain’s politics have historically been dominated by a two party system. But over the weekend voters ended 38 years of two party rule by handing enough votes to two new parties, the far-left party Podemos, and the right-of-center Ciudadanos, essentially altering the country’s political landscape. We’ll take a look at what happened and what lies ahead with Luis R. Corteguera is a professor of history at the University of Kansas and author of “For the Common Good: Popular Politics in Barcelona, 1580–1640.” (AP Photo/Daniel Ochoa de Olza)