The man who gave us the incandescent light bulb thought we should never turn out the lights at all, says The Atlantic in a fascinating article chronicling the cultural history of sleep deprivation.

For some, sleep loss is a badge of honor, a sign that they don’t require the eight-hour biological reset that the rest of us softies do. Others feel that keeping up with peers requires sacrifice at the personal level—and at least in the short-term, sleep is an invisible sacrifice.