Regarding this "kinship" issue, I would like to offer this thought: perhaps ChrisD and CB are using the word differently? Chris seems to be doing so in the way evolutionary biologists do: kin = a blood relative. Kinship being considered from the perspective of kin selection, where consideration is extended on the basis of shared blood (i.e., gene). CB seems to be referring to the broader notion of kinship: a sense of affinity, etc., as in "kindred".
[Howdy Woj!]
--ravi