Simply put, the sin of sloth is the sin of the lazy. According to medieval theologians, it can doom a person to Hell. Some scientists suggest that the sin of sloth may actually be a medieval diagnosis of clinical depression. Is it a sin or a disease?

The historical cures for the sin of sloth range from ancient Greek doctors who fought it with herbs, to medieval monks who prescribed prayer and fasting, to early 20th Century doctors who battled "lack-of-pep" with grafted goat glands.

In this intriguing series, HISTORY examines the impact of the seven deadly sins on mankind throughout the ages.

We learn how the concept originated 'as a way to keep a lustful fourth-century monk from sinning again 'and how they were pared down from eight to the seven we recognize today: gluttony, lust, greed, anger, sloth, envy, and pride. For the Catholic faithful they became a guide on the path to heaven. To repeat offenders, they promised damnation in Hell and very specific, very gruesome punishments. Gluttons, for instance, would be force-fed rats, toads and snakes.

The warnings couldn't be clearer: Succumb to any of the seven deadly sins and God's judgment will be severe.

Film Duration: 44 min