Mr. Sussman:  Your letter reminds us all that, indeed, mental illness (and substance/alcohol abuse) are diseases and too often we simply blame the individual for not being "strong" enough to avoid or "defeat" them.  Mr. Alison's death, like other (likely) suicides are all too common among the large mentally ill and/or substance abusing population.  As a society we need to do far more to help these very troubled individuals.  Your letter reads like you knew Mr. Alison and may I offer my sympathy for the loss of your friend.  Gary Crum