You know, don't revolutions ever END? We don't go around saying we're in the 225th year of the American Revolution.
Interesting question, actually. Revolutions are often fought and won with a lot of young men. They take power, rise through the ranks... And the Revolution continues.
The Revolution ends when the youngest revolutionary dies of old age.
Remember when the Soviets went through Brezhnev, Andropov, Chernenko, and finally Gorbachev in the space of a few years? The first three were pretty much the last of the Bolshevik Revolutionaries in the Politburo. Once they were gone, the revolution died, and voila! ...Perestroika.
Similar stuff is starting to happen now in China.
Give it another 10 or 20 years, and it'll happen in the American Civil Rights movement, as well.
Jesse and Sharpton are just about the last of the active orifinal arm-linkers.