“I suppose it is tempting, if the only tool you have is a hammer, to treat everything as if it were a nail.” You’ve heard the expression before. You’ve may have, like myself, smugly used it a few times to feel like you made an intelligent point in an office conversation. It’s one of those great comebacks that we’ve decided is ok to use in professional settings like congressional debates and televised political arguments about everything from gun control to foreign policy. But, it might surprise you to learn who wrote it, how young the above quote is, and why it was written in the first place.