ATHENS – Costas Simitis, the former Greek prime minister instrumental in Greece's adoption of the euro, passed away at the age of 88. State television ERT reported the news, confirming Simitis's death following a sudden illness. Details surrounding the cause of death will be revealed after an autopsy.

Simitis, a key figure in the Socialist PASOK party, served as prime minister twice. He succeeded Andreas Papandreou, navigating a complex political landscape defined by differing leadership styles – Simitis's measured approach contrasted with Papandreou's populist stance. His pro-European stance set him apart from Papandreou, a critical point in Greece's future.

During his first tenure in the 1980s, Simitis spearheaded crucial economic reforms, including austerity measures aimed at stabilizing Greece's struggling economy. His early successes were challenged when Papandreou's later policies countered these efforts.

Following a period out of office, Simitis returned to power in 1996, with his premiership culminating in Greece's entry into the eurozone in 2001. This marked a significant achievement in his career and had a profound impact on Greece's economy. He also oversaw the successful bid for the 2004 Olympic Games and supported Cyprus's accession to the EU.

Despite considerable achievements, Simitis faced criticism. Opposition to pension reforms in 2001 ultimately weakened his administration. He ultimately chose not to run for re-election in 2004, citing this opposition.

His legacy also includes a warning about the potential consequences of financial mismanagement. Predicting that the country might face stringent IMF intervention, his concerns materialized with the country's subsequent economic crisis and subsequent IMF involvement. His final years were marked by disagreements with his successor and political rivals.

Simitis's life was deeply rooted in Greek political history. Born in 1936 to politically engaged parents, he pursued his legal studies in Germany and the UK, ultimately returning to teach law at the University of Athens. He is survived by his wife and two daughters.