I've been trying to figure out what this story's title is for years (I read it in Junior High back in the 80's).
I remember very little about the story, other than the narrator describing his discovery of a group of people who use a learned mental power to control probability. The group is able to use this power to destroy all nation's abilities to construct, or maintain, any sort of complex weapons (other than crude sticks and such). The story ends with the narrator relating that he has just flipped the same coin toss some outrageous amount of times in a row (or maybe it was a dice throw that came up the same - can't remember) and he was now ready to join the ranks of the group and go into hiding.
Any ideas?