Konstantinos Simitis (Greek: Κωνσταντίνος Σημίτης; 23 June 1936 – 5 January 2025) was a Greek politician who led the 'Modernization' movement of Greece. He succeeded in leadership Andreas Papandreou, the founder of the Panhellenic Socialist Movement (PASOK), and served as Prime Minister of Greece from 1996 to 2004. Simitis was a founding member of PASOK, and he gained significant ministerial experience in Papandreou's governments. Simitis' reputation was marked when he became Minister of National Economy in 1985 when PASOK's profligacy needed a new financial 'stability' imposed through an economic adjustment programme. With stability achieved and the party's popularity waning, Papandreou distanced himself from Simitis' policies, and Simitis resigned. In 1996, Simitis won the leadership of PASOK after Papandreou's failing health. However, the leadership transition from Papandreou to Simitis was confrontational by Papandreou's loyalists, who wanted to prevent such a transition from being realized. Simitis lacked his predecessor's charisma, and the fractured party's support limited many of his actions in government. However, by the end of his tenure in 2004, Simitis had several significant achievements and reforms in the wider society and economy to proclaim. After two decades of the exuberant rhetoric of Simitis' predecessors and financial stagnation, the Greek economy was put in order and became one of the fastest-growing economies in Europe, with an average annual increase of 4.1% of gross domestic product (GDP). The performance of the Greek economy under Simitis sealed the Greek entry into the Euro currency, closing the journey of aligning Greece with the West, which started with Eleftherios Venizelos and continued with Constantine Karamanlis. Simitis also succeeded in the Cypriot accession into the EU, a diplomatic priority for Greece. The successful completion of the Athens 2004 Summer Olympics also boosted Greece's positive image as a modern state capable of undertaking sophisticated tasks. Moreover, a variety of large-scale infrastructure projects were completed, like the new Eleftherios Venizelos airport, the Athens Ring road, Athens Metro, and Rio–Antirrio Bridge. New institutions were also introduced, such as the Greek Ombudsman and several regulatory bodies to supervise market liberalization. After the debt crisis erupted in Greece in 2009, the legacy of Simitis was re-interpreted by critics as insufficient or misleading. However, government institutions under Simitis were developed and strengthened in their capacity to reform, appearing both more 'modern' and 'European.'