There are no answers to Robin Williams’ suicide, only questions.  
Little is known of Robin’s family history of depression, but there are reports of childhood loneliness, shyness, sadness, and melancholia. He played alone for hours. Did the inability of his parents to allow him to attach to them lead to a lifetime of attachment-seeking through substances and entertainment? 

Little is known of his father, Robert Fitzgerald Williams, who as a Ford executive responsible for the midwest traveled a great deal, and appeared to be distant emotionally and physically absent. William’s only mention of his father was when he recalled his father’s wrath when Robin bought his first foreign car rather than a Ford. Did his inability to identify with him lead to his inability to form intimate enduring attachments to women?