Greece and its creditors have started negotiating a third rescue package worth up to 86 billion euros, but prime minister Alexis Tsipras is facing a rebellion from the hard left in his party, Syriza, who accuse him of going back on his promise to reject austerity. It is not just economics that is at the heart of the disagreements, it is a struggle for what kind of country Greece wants to be in the 21st century. Zeinab Badawi talks to Stathis Kouvelakis, a Syriza central committee member. Who is winning the argument in Greece?