No matter how early she went to bed, Maggie couldn’t fall asleep until the early hours of the morning. Though constantly exhausted, Maggie (she asked that I not use her last name) got good grades in high school, but she'd frequently get in trouble for coming in late and napping during her morning classes.
Maggie dreamt of going to medical school. Unfortunately, she couldn't concentrate during early morning science classes in college, and she had to switch her major from biology to literature. Her post-grad situation was no better: Waking up for her 8:30 a.m. teaching position turned her into a zombie, and she lost her job because she lacked enthusiasm. She switched career paths to take on a marketing position that was supposed to be afternoon-only, but once her boss started requiring her to come in mornings, it didn't work out—and she's now unemployed.
Maggie isn't lazy; she suffers from delayed sleep phase syndrome (DSPS)—a disorder that affects one in 750 adults that causes them to be somewhat nocturnal. By that estimate, DSPS affects over 400,000 Americans. Essentially, DSPS means a person's internal clock is set differently. These clocks, called circadian rhythms, are innate and often change over the course of a person’s life—which is why little kids wake up so early, and teenagers prefer to sleep in.
DSPS sufferers have internal clocks that run at least two hours slower than normal, giving them "social jet lag" which is pretty much what it sounds like: They’re out of sync with the rest of society. They struggle to keep their eyes open during morning business meetings because their bodies are convinced it's the middle of the night. DSPS can wreak havoc on their health and careers, causing depression, anxiety, brain damage, heart disease, drug addiction, and a myriad of other afflictions due to sleep deprivation.