Originally Posted by brandonstills

For those who don't know. 2nd sleep was the norm before industrialized society. 2nd sleep probably came about because in winter it gets dark super early and people don't want to waste candles so they go to bed but you can't really sleep for 12 hours straight every night so they would wake up in the middle of the night and do something until they fell asleep again. Hence 2nd sleep. It's not really that common now that we have heating and electric lights so we just go to bed much later.