I was recently a panel member on an ISSA Thought Leadership Webinar, The Persistent Pernicious Myths and Hidden Truths of Cybersecurity. Zane Lackey of Signal Sciences and Greg Young of Trend Micro each spoke about specific myths they have worked on. My contribution was thoughts on how myths happen and what we can do about them. My human factors approach to cyber security led me to look at a bit of simple history of our field, from communications security through several steps to today's cyber security. With quick review of the basics of a systems model that includes people, the processes they follow, and the tools they use, I made a few observations about human nature (e.g., unlearning is harder than learning & we're lazy), and traced the history of one particular myth that was once a truth in our field.