Sao Tome and Principe

Portugal discovered and colonized the uninhabited Sao Tome and Principe islands in the late 15th century, setting up a sugar-based economy that gave way to coffee and cocoa in the 19th century -- all grown with African slave labor, a form of which lingered into the 20th century. While independence was achieved in 1975, democratic reforms were not instituted until the late 1980s. The country held its first free elections in 1991, but frequent internal wrangling among the various political parties precipitated repeated changes in leadership and failed, non-violent coup attempts in 1995, 1998, 2003, and 2009.

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