I was just reading about biphasic sleep and suddenly I understand myself a whole lot better. Throughout human history, people have gone to bed just after dark and slept, awaking naturally in the middle of the night. They would spend an hour or so doing quiet stuff like reading, checking the kids, in prayer, stoke the fire, have a drink or whatever, then go back to sleep again until daybreak. I've always slept in a "split shift" and felt bad because I couldn't do a solid 8 hours or so. Apparently people have only been sleeping in a solid block since the advent of modern electric lights. So I'm not a bad sleeper after all 🤔