if you’re worried about your safety or haven’t had enough to eat. It’s hard to sleep if you’re one of the 15 million American shift workers who work irregular hours. Research has also found that there’s a black/white sleep gap. One study shows that, while white people sleep an average of 6.85 hours, African Americans sleep an average of 6.05 hours. They also have a lower quality of sleep. Researchers have attributed this, in part, to the stress of discrimination. Want to know who gets the most sleep and the best quality of sleep in America? Wealthy white women. Which, if I’d hazard a guess, is probably the same demographic Huffington is targeting her book at. Huffington describes her promotion of sleep as a “revolution” but, really, it’s a rebranding. The very real sleep crisis we face isn’t down to a few rich people thinking it’s a waste of time; it’s down to the 99% not being able to afford to spend time sleeping. While sleep is currently enjoying a moment, it will probably be short-lived. Sleep may be a performance enhancer but it’s an inefficient one. The real prize is finding a way to negate sleep deprivation so humans can function on less sleep. Unsurprisingly, the military is at the forefront of this research. In 2008, the Pentagon published a report called “Human Performance” which examined the possibility of a future in which soldiers