Abuse and Suicide Risk

According to Psych Central News, the risk of suicide attempts made later in life have much to do with the frequency and type of abuse that has taken place during childhood, and that risk is also influenced by the identity of the abuser.

sexual abuse by an immediate family member (such as a father, stepfather or brother) carried the greatest risk. Abuse perpetrated by an extended family member (uncle or cousin) carried an intermediate risk, while abuse by an unrelated individual (an acquaintance, romantic partner or stranger) carried a weaker risk.

http://psychcentral.com/news/2008/08/04/suicide-risk-among-abused-children/2685.html

The article continues to explain why certain types of abuse increase the risk of suicide ideation.

abuse by a father or stepfather is considered especially traumatic, possible because such abuse is more likely to occur in families with multiple problems and also because these families cannot provide safe and healing conditions following abuse.

Second, abuse by close family members may have long-term consequences on the development of health attachment patterns necessary for mental health.

I find this very interesting, since so many adoption specialists like to blame an adoptee's suicide mission a manifestation of bad genetics, linked to depression.  After all, why else would an adopted/fostered child want to commit suicide, unless the birth parents, (or their equally messed-up families) had a history with depression or suicide?

<rolling eyes>

Since most of us adult adoptees don't have access to our birth records or family histories, I'm curious how others see the drive to commit suicide.  Heredity or home environment, which is more likely to lead a person to the end of his/her rope?