Following U.S. President Barack Obama’s trailblazing visit to Cuba, a free concert by the Rolling Stones in Havana might seem like a relatively minor event. Obama revived relations with Cuba after more than a half-century of deep hostility. The septuagenarian Stones just played some very loud music. And yet, symbolically, the concert was not minor at all.

Let’s hand it to the U.S. government: At least this disastrous attempt to overthrow the Castro brothers did not almost lead to nuclear annihilation. But its impact on activists around the world who use digital tools to organize against repressive regimes feels devastating enough.
 

During the memorial service for former South African president Nelson Mandela, as tens of thousands gathered in the FNB stadium in Johannesburg and millions more watched on television, an entirely different story emerged: the ten-second interaction between U.S. President Barack Obama and Cuban President Raul Castro.