This was a bad year for bad guys. Departing the political scene — or departing the scene altogether — were Osama bin Laden, North Korea's "Dear Leader," Kim Jong Il, and a trio of Arab leaders: Tunisia's Zine el-Abidine ben Ali, Egypt's Hosni Mubarak and Libya's Moammar Gadhafi.

There isn't much tying these farewells together. Bin Laden, who was killed by U.S. Navy SEALS in Pakistan in May, died of what might be described as unnatural but unsurprising causes. Kim, meanwhile, died of a heart attack last week but had been in failing health after a stroke several years ago. Both men could have died at any point in the past several years — 2011 just happened to be their time.

The Arab leaders, by contrast, all lost their positions (or lives) on account of unique political circumstances. They were turned out by their own citizens in a sort of intifada, a casting off, wrought by collective humiliation and frustration linked to a lack of political voice and economic opportunity.