In the latest installment of our “What Happens Next” series examining the future of society, we visit Medellín, Colombia—a city that has reinvented itself over the past few decades, turning its violent past into a sustainable future by transforming its slums.

The moments we remember from political debates are embedded in our political folklore, from the knockout lines to the losing gaffes. But does media coverage often miss the real lessons they offer?

After a string of critical losses in the 2008 Democratic primary, Hillary Clinton's campaign put out a hard-hitting ad that questioned Barack Obama's readiness for the White House.

In the 2012 Republican primary, Herman Cain's campaign produced an unusual video featuring Cain's chief of staff, Mark Block, giving a pep talk while smoking a cigarette.