First of all, as married people know, not all marriages are created equal. A happy one is sure to increase an overwhelming sense of emotional support and well-being, which is associated with lower levels of depression, cardiac death and other chronic and occasionally fatal diseases. But an unhappy marriage produces quite the opposite.
“A bad marriage can make a person feel more isolated than being single,” sociologist Eric Klinenberg, who wrote a book about trends in singledom, told the New York Times.