This chapter examines the French Socialist Party (Parti socialiste, PS), which is one of the least successful of the major European social democratic parties. It focuses on the period between the 2008 global financial crisis until the end of François Hollande's presidency in 2017. The crisis of the PS is twofold: first, a political crisis that is revealed by the divisive nature of the Party's internal courants (factions). Whereas the factions initially contributed to the PS's internal democracy, over the past two decades they have significantly affected the PS's cohesiveness and ability to effectively develop and implement necessary policies. And second, an economic crisis that is exemplified by the PS's inability to adapt to its external and internal environments, such as the neoliberal imperatives of the EU, unprecedented high unemployment, and increasing insecurity.