It is a well known fact that some of the greatest leaders of America faced serious mental health problems in their lives.
However, psychiatrists and psychologists have now pointed out that the mental illness of these leaders may have helped them in times of crisis.
Presidents Abraham Lincoln and John F Kennedy, along with Civil War generals Ulysses S Grant and William Tecumseh Sherman and civil rights leader Martin Luther King Jr, all struggled with mental health issues, often depression, said Tufts University psychiatry professor Dr Nassir Ghaemi, who has written about historical figures' psychological issues.
He also points to British Prime Minister Winston Churchill and India's Mahatma Gandhi as major historical figures who thrived while having emotional issues.
"Some of those mental health problems can, in fact, make for greatness," said Katherine Nordal, a psychologist who heads the American Psychological Association's professional practice program. Other professionals agreed.
Saying someone has psychiatric issues, "in my view ... is a compliment," said Ghaemi, author of the book "A First-Rate Madness: Uncovering the Links between Leadership and Mental Illness." He used medical and historical records to analyze historical figures.
Manic depressive people are often more creative, more empathetic and realistic than the more mentally healthy, Ghaemi said. These people tend to succeed in times of crisis and fail in times of peace and prosperity, he said.
Two sets of leaders illustrate that.
Sherman was severely depressed, reportedly suicidal, while General George McClellan was considered mentally healthy but not a successful general in crisis, Ghaemi said. Grant, who had a problem with alcohol, excelled during wartime but did not do well as a peacetime president, he said.
More recently, Churchill suffered repeated long bouts of depression which he was open about, calling it his "black dog." His predecessor as prime minister, Neville Chamberlain, was the same political party - Conservative - but more mentally healthy and yet didn't see the threat of Adolf Hitler.
Churchill thrived in the crisis of wartime but failed in the post-war peace and prosperity, Ghaemi said.
(With AP inputs)
