I think we should preface this with some background on how the moral opinions on suicide are shaped by culture. Broadly speaking two major categories have been defined.
QuoteVarious sociologists and anthropologists have contrasted cultures of honour with cultures of law. A culture of law has a body of laws which all members of society must obey, with punishments for transgressors. This requires a society with the structures required to enact and enforce laws. A culture of law incorporates a social contract: members of society give up some aspects of their freedom to defend themselves and retaliate for injuries, on the understanding that society will apprehend and punish transgressors.
^Wikipedia page "honour"
Honor cultures would include Japan under the Shogunate, Rome under the republic, the American frontier West, etc. In all of these cases it is customary to hold one's honor dearer than one's life. Dueling, honor killing, and ritual suicide all have some portion in these societies. More anon...