Well, now we might be wading into a question of definitions. Some believe anarchy is a lack of government. Others believe it is the elimination of all hierarchy. Now I'm sure someone will just break out a dictionary, but regardless, much of anarchist thought has been about destroying hierarchy.Anarchy exists in your everyday life. In your home, your business, a skating rink, etc. Every place the government is not managing is in a state of anarchy. It merits study for the same reason Spontaneous Order (or any other observable thing) merits study. It's a real and observable phenomenon in nature.