This brings to nine the number of artists who have pulled out of the Biennale because of its partnership with Transfield, which manages the offshore detention of asylum seekers. Agnieszka Polska, Sara van der Heide, Nicoline van Harskamp and Nathan Gray announced today they would not participate in the prestigious exhibition. They have asked the Biennale to leave their spaces blank so their protest will be obvious.

When the pundits talk about Vladimir Putin’s offensive in Ukraine, they usually mean troops and tanks, but his greatest weapons are ,in fact, his propaganda machine and the gullible western media. So far, he has been winning stunning victories without firing a shot.

Revellers in Rio have joined a whirl of festivities as carnival fever took hold, the world's biggest street party putting firmly aside lingering protests over corruption and the cost to Brazil of hosting the World Cup. With the football extravaganza now just three months away, flamboyantly dressed metropolis residents indicated that, for the moment, they had spent enough time demonstrating and wanted to let loose instead.

If there are two Brazils, then one of them is here, in a café by the Praça São Salvador, a few blocks from the beach in Rio de Janeiro. Wearing a gray T-shirt, sunglasses and a ring in the shape of a human skull, Alan Fragoso, 27, takes a sip of his caipirinha. Fragoso used to be a sort of Brazilian Don Draper, an advertising man selling products to the nation's emerging consumer class. Then one day he quit. "What I really want is to work with projects I believe in," he says, "not to invest in consumption."

At a recent series of events in Beijing hosted by the Berggruen Institute, I was asked to speak about social media and the potential harm and good associated with it. My view is pretty straightforward -- I believe that social media is a tool of liberation and empowerment. That may seem fairly audacious when a good portion of the Western world is using Facebook and Twitter to post pictures of what they had for dinner or take quizzes on what TV character they may be. 

If Brazil is not for beginners, as the saying goes, then Venezuela isn't, either. But as far as the two countries' recent protest experiences go, they have a few interesting elements in common. At first glance, the countries seem quite different: Venezuela is deeply and bitterly politically polarized, with shortages of basic food staples and goods, rising inflation, spiraling crime rates, and what some say is a breakdown of institutions.

Sustained anti-government rallies in Thailand, Ukraine and Venezuela have captured the attention of millions. But large pro-democracy demonstrations in Burkina Faso last month largely escaped the Western media’s radar. Since January, tensions have flared between the West African country’s authoritarian government and the impoverished masses yearning for democratic reforms. Depending on how developments unfold, the protests in Burkina Faso could serve as a catalyst for further uprisings in the region.

The protesters who have overturned the politics of Ukraine have many aspirations for their country. Their placards called for closer relations with the European Union (EU), an end to Russian intervention in Ukraine’s politics and the establishment of a clean government to replace the kleptocracy of President Viktor Yanukovych.