Since the sixteenth century, Colombian society has been highly stratified, with social classes generally linked to racial or wealth distinctions, and vertical mobility has been limited. The proportion of white ancestry has been an important measure of status for the mixed groups since the colonial era. In the nineteenth century, Colombia's rugged terrain and inadequate transportation system reinforced social and geographic distance, keeping the numerically superior but disunited masses fragmented and powerless. The nascent middle class lacked a collective consciousness, preferring to identify individually with the upper class. Except in certain instances of urban artisans and some Amerindian communities, the elite was the only social group with sufficient cohesion to articulate goals and m