Euroscepticism has taken hold across the EU - but it has many different roots

Euroscepticism - defined as outright or defined opposition to the European project - is becoming a mainstream, contested phenomenon, writes Simona Guerra. The EU has been challenged by the Greek referendum in July 2015, the refugee crisis and Brexit. Euroscepticism is no longer the exclusive province of 'peripheral' parties like Ukip or the fringes of society. How did a previously sidelined set of views come to the forefront of public discourse?