 The Radical Republican Party was founded on 6 January 1908 in Santander by the Lerrouxist wing of the Republican Union, which splintered in disagreement from Nicolas Salmerón's policy of alliance with Catalan regionalists.Initially, its structure was loose enough and its Radicalism broad enough to contain many different tendencies, notably a Radical-Socialist left wing led by Alvaro de Albornoz, a centrist wing led by Diego Martínez-Barrio and a right wing led (from 1910) by Alejandro Lerroux.Over time the left factions periodically splintered off to form more socially-progressive Radical parties