[1] PSU was founded in 2001, following a split from the Burkinabè Socialist Party (PSB).
The party was led by Benoît Lompo.
[3] PSU is part of the United Burkinabé Opposition (OBU) and the Socialist Alliance (together with the People's Movement for Socialism/Federal Party).
However, the decision of the Socialist Alliance to support Emile Paré in the 2005 presidential elections has strained the relations between PSU and OBU.
This article about a Burkinabè political party is a stub.