This is a "stacked graph." The top line shows the total number of all wars. The area underneath that line breaks down the type of wars: the blue area designating civil wars, the yellow international wars, the red colonial wars. A few things are worth noting. The number of international wars has always been low. Colonial wars petered out in the 1970s, but that had almost no impact on the overall number of wars, which in fact soared in the subsequent decade. Finally, though civil wars did decline dramatically after the end of the Cold War, there are still more of them than at any time before the '70s.