Yes, I kind of can't vote- fail at what? Did his raid fail? It can't be as easy as that since we all know the answer- fail at his life's mission, in which case, does anyone know what that was, really? Did he fail to make a difference in the lives of a people in bondage, in ending their condition? That would have to be no, he succeeded albeit through a ham-fisted raid effort.
John Brown's life was defined by a lot more than that one, single event he's know for- what would he term a failure or success? I'm seriously asking, just can't speculate.