The Humbertistas, also occasionally referred to as Ruizistas, were a political faction that played a pivotal role in the leadership of the Colombian Social Party from the 1930's deep into the 1960's, named after Humberto Ruiz, whose Presidency gave birth to the subgroup. The Humbertistas generally reflected the moderate wing of the Social Party and dominated the party in both a leadership role with Ruiz as President from 1930-1946, and the majority of the party in an opposition role in the PDC era of the 1950's and 1960's were generally Humbertistas.