Ellis, Stephen. "The Mutual Assimilation of Elites; The Development of Secret Societies in Twentieth Century Liberian Politics". African Social Studies Series, Volume 22. January 01, 2011. Pages 185-204.

The region that eventually gained international recognition as the Republic of Liberia in 1847 has a rich history of initiation societies that predates the modern state. One of the most well-known of these societies is the men's group called Poro, which has been prevalent in the northern part of the country since before the establishment of the republic. During the 20th century, politicians and officials of the Republic of Liberia employed these initiation societies as a tool of indirect rule, both in official and unofficial capacities. This influence had a tangible impact on the governance style and institutional evolution of the Republic.

Source: Article's abstract