There's also a big link between lack of sleep and both obesity and cancer (and dozens of other health problems).

Western society has glorified not getting enough sleep as though it makes you manlier or better in some way. It doesn't. It just makes you die sooner.

We've moved to an "always on" society with the proliferation of the internet. With this comes disrupted circadian rhythms and even more reasons/excuses to not follow a regular or beneficial sleep schedule.