There was an excellent programming conference last weekend, and the first talk was this one: https://www.youtube.com/watch?v=wo84LFzx5nI

It's one of my favorite categories of thing: a deep dive into the history of how things got to be the way they are. So much of modern culture is ahistorical, and IME our field is particularly bad in this respect. It is worthwhile to learn about how theories and techniques developed over time, and to be conscious of the historical context in which we work.