Greece faced a sovereign debt crisis in the aftermath of the financial crisis of 2007–08. Widely known in the country as The Crisis (Greek: Η Κρίση), it reached the populace as a series of sudden reforms and austerity measures that led to impoverishment and loss of income and property, as well as a small-scale humanitarian crisis.[6][7] In all, the Greek economy suffered the longest recession of any advanced mixed economy to date. As a result, the Greek political system has been upended, social exclusion increased, and hundreds of thousands of well-educated Greeks have left the country.[8]

The Greek crisis started in late 2009, triggered by the turmoil of the world-wide Great Recession, structural weaknesses in the Greek economy, and lack of monetary policy flexibility as a member of the Eurozone.[9][10] The crisis included revelations that previous data on government debt levels and deficits had been underreported by the Greek government:[11][12][13] the official forecast for the 2009 budget deficit was less than half the final value as calculated in 2010, while after revisions according to Eurostat methodology, the 2009 government debt was finally raised from $269.3bn to $299.7bn, i.e. about 11% higher than previously reported