Lucille Forer, The Birth Order Factor, 1976, 116-7
Only children, sometimes eminent in politics, are often friendly and well liked. Like Franklin D. Roosevelt, they may have that charm and personal magnetism known as charisma. Only children also gain a strong sense of independence and self-reliance from the circumstances within their families. Buddha and Stalin were only children. Also in this category are Indira Gandhi…Mary, Queen of Scots; Eleanor Roosevelt; and the Duchess of Windsor.