While the far left government will pose the referendum as a vote for or against austerity, the right will say it¿s an in-out vote for the single currency and the EU itself.
If today's Brussels talks fail, the Greek debt crisis could stop being a story about economics and become one of civil society, politics and the rule of law.
With negotiations between Greece and its lenders stalled, but the differences amounting to around 0.6 per cent of Greek GDP, the stage is set for either a last-minute deal or a breakdown.
The Greek crisis ramped up a gear last night when, at the start of supposed "last chance" talks in Brussels, EU negotiators told the Greek delegation that "negotiations were over".
Today Israel has exonerated its military from any criminal charges relating to the action. It says they were playing in a "compound" clearly identified...
Why did Greece collapse and Ireland survive? First, because the Irish crisis was a banking crisis. And in Greece you can't impose austerity and hope modernise at the same time.
While Tsipras, Varoufakis and their negotiators have been trying to get the country's debt reduced via the IMF and ECB, Zoe Konstantopoulou has been working to get it declared invalid.
The break-up of the Eurozone will lead to the sort of "nationalisms" seen in the run up to the Second World War, Greece's top negotiator Euclid Tsakalotos tells Channel 4 News.
They came, they saw, they had ¿ as one Syriza MP put it to me last night ¿ ¿their balls handed to them¿. For all the smiling and calm displayed by Alexis Tsipras, the Greeks know they came off the wor
There may be a technical get-out clause that allows Greece to wrap its four repayment dates to the IMF this month into one, but the IMF¿s own assessment is correct: Greece can't pay.
Running short of cash to pay public sector salaries, pensions and debt obligations, Greece's Syriza has laid out what it will and will not negotiate with its creditors, but will it be enough?
Both in Spain and Poland, centrist pro-EU politics is falling victim to its association with a crony-ist elite and its failure to tell a convincing story to the young.