Winston Churchill would fit in perfectly with today’s social media culture. His style was to communicate constantly, interpreting events as they unfolded, and explaining what he intended to do in real time. Churchill’s astute observations and keen wit helped to build his towering reputation as a great leader. Although public speaking was the primary medium of the day, Churchill was a prolific writer who came up with some of the best, less-than 140 character quotes in history.

Almost as soon as a Russian court convicted activist Alexei Navalny of embezzlement, on highly dubious grounds, in July 2013, U.S. Ambassador Michael McFaul tweeted his disappointment at the “apparent political motivations in this trial.” Within minutes that comment echoed across Russia’s social media landscape, eventually generating nearly 1,000 retweets and getting picked up by numerous media outlets.

China's largest official news agency, Xinhua, is experiencing some growing pains on Twitter. It started tweeting in March 2012, but has amassed only 22,942 followers since, small potatoes set against its 9.2 million fans on Weibo (Chinese Twitter). Snafus like this might help explain why Xinhua's not getting more English-language social media love.

Dalit Camera, a popular YouTube channel dedicated to India's Dalits (formerly untouchables), has become a rallying point for the community, reports Vanya Mehta. "I believe that the protests in Delhi over the gang rape of a student have no other political significance than a mere middle class fury," feminist and Dalit activist Rekha Raj says, standing with a microphone in the city of Kottayam in the southern state of Kerala.

The result is what we academics call premature closure, or what policy makers call a failure in due diligence; basically an unwillingness to consider all of the potential options, the risk and the consequences of a particular course of action. In this newspaper and elsewhere, I have addressed the reasons why a foreign policy that is not open to public scrutiny lacks both accountability and legitimacy.

Iran is a country of many contradictions. You have have heard that before. Unrelated men and women aren't allowed to mingle freely, yet they find a way to do so. Women are required to cover their hair, but many cover it in a way that becomes a fashion statement. There are many others. Here's another contradiction: Iranian officials — including the President Hassan Rouhani and foreign minister Javad Zarif — are frequent users of social media. Yet Iranian citizens are officially banned from signing up.

The use of social media is exploding in Brazil. It's the third largest market for Facebook; fifth largest for Twitter. The controversial women-only app Lulu recently launched here and quickly became the top downloaded app in the country, making Brazil Lulu's biggest market. "I think it is cool because it's a social network for what all women throughout history have always done," says 20-year-old Marcela, as she taps away at the Lulu app on her iPhone.

On the cusp of the New Year 2014, I went to St. Peter’s Square to see and hear perhaps the only person in the world -- not counting Justin Bieber, Rihanna or the boys in One Direction -- able to draw an eager outdoor crowd of 100,000 on a chilly, drizzly, gray December afternoon. It was Pope Francis’ first Christmas Day speech to the city and the world, and what I witnessed was a leader aware that he lives in an era of rampant digital disruption.