in favour of the "No" vote in the Greek bailout referendum. As an MEP he also participated in a support protest in Brussels, along with thousands of Belgians in favour of Greeks voting negatively in the referendum, a few days before the latter takes place. He resigned from his position in the European Parliament in July 2015, being succeeded by Nikolaos Chountis. The same year, he left SYRIZA before the September 2015 Greek election, where he was an MP candidate with the newly formed Popular Unity party. In 2018, Manolis Glezos publicly voiced his opposition to the Prespa Agreement between Athens and Skopje on the resolution of the Macedonia naming dispute -despite the agreement being promoted by the SYRIZA government party which he formerly supported. In an article for the Greek daily paper Kathimerini, he insisted that the people of the neighbouring country should "define themselves in accordance with their history, language, traditions... taking out of their mind the word Macedonia". Non-political career Apart from his political work, Glezos invented a system to prevent floods, combat erosion and preserve underground water, that works by the constructions of a series of very small dams that redirect water to aquifers. For his contributions to democracy, to geological sciences, and to linguistics he was pronounced honorary Doctor of Philosophy of the University of Patras (Department of Geology) in 1996, of the Aristotle University of Thessaloniki (Department of Civil Engineering) in 2001, of the National Technical University of Athens (School of Mining & Metallurgical Engineering) in 2003, and of the National and Kapodistrian University of Athens (School of Philosophy) in 2008. Death On 30 March 2020, Glezos died of heart failure, at the age of 97. Alexis Tsipras, former Greek prime-minister, said, "He will remain for all eternity the symbol of a fighter who knew how to sacrifice himself for the people." The Russian president Vladimir Putin sent a condolence message to the Greek government, which included, inter alia, the following words: "To his Excellency, PM Kyriakos Mitsotakis. May you accept [my] deep condolences for the loss of Manolis Glezos, a brilliant political and social figure of Greece and a hero of the Greek Resistance at World War II. Manolis Glezos was a true friend of our country [...] He [also] greatly contributed, in person, in the struggle against the distortion of history. [...] With honour, Vladimir Putin. Moscow Kremlin, April 1st, 2020" Publications