It's a slippery concept but academics have reached agreement on some of its fundamental elements.
Leader of a corrupt party, an unpopular government and a divided country, Mariano Rajoy's days were numbered long ago.
While often lumped with other European populist parties, Beppe Grillo's M5S is a movement of activist fans mobilized by the messages of his "celebrity brand".
Barcelona has become the test case for separatists Europe over.
At a time when our political future is uncertain, the only way to guarantee change is to do it yourself.
We’re not sure if the cure, the populist outsider, will work and make life better. but we are willing to experiment as the old certainties of representative politics wither.
Protests in South Africa are about more than just service delivery of basic services such as water and electricity. They reflect a wider crisis about the failure to build a more equitable society.
What do Nelson Mandela, Chairman Mao and Spanish politician Pablo Iglesias have in common with Donald Trump?
Podemos positioned itself as leading a revolt by the people against the political system. Now, as Spain's third-largest party, it is part of that system and has some difficult decisions to make.
After two elections and months of deadlock, a minority administration has been agreed. But the situation is far from stable.
Labour's leader has a renewed mandate to put his party at the vanguard of the left – but others have walked that road before.
With two votes failing to produce a government, caretaker PM Mariano Rajoy is running out of options.
For many contemporary observers, the Spanish Civil War was seen as very much of a piece with the war against Hitler and Mussolini. But then things changed. Why?
Spain couldn't form a government after its last election, so it had to try again. And it looks like the radicals are shut out.
As Spain found out at its last election, voting for change is one thing, but achieving it is quite another.
The future of democracy depends on developing a left-wing populism that can revive public interest by mobilising political passions in the fight for an alternative to neoliberal de-democratisation.
Proposed labour reforms in France have sparked mass protests led by young people who want to reclaim democracy from the elite.
More than two months after the election, Spanish politicians still can't provide the people with the government they demanded.
Parliamentarians have again failed to form a coalition, nearly three months after the election.
Spain's most controversial sport has been in strife lately. But anthropologist Robin Irvine explains why a year working on a bull-breeding estate made him optimistic for its future.