This is a cogent example of kin-based altruism a la Hamilton.    From Wordnik.com.  [The Volokh Conspiracy » DOJ Boosts the Cause of SSM:] Reference

If you are saying that the proclivity to kin-based nepotism varies by geography and ecology, as evolution would predict, I agree withyou.    From Wordnik.com.  [The Volokh Conspiracy » “Christian Hotel Owners Hauled Before Court After Defending Their Beliefs in Discussion With Muslim Guest,”] Reference

If you are saying that the proclivity to kin-based nepotism varies by geography and ecology, as evolution would predict, I agree with you.    From Wordnik.com.  [The Volokh Conspiracy » “Christian Hotel Owners Hauled Before Court After Defending Their Beliefs in Discussion With Muslim Guest,”] Reference

Before this period the sultan was still a kin-based leader; afterward, he could act without the consensus of the elders of many settlements.    From Wordnik.com.  [e. Maluku (Eastern Indonesia), 1500-17th Century] Reference

The DMK demonstrated effective campaigning to promote an ideology of regional identity expressed through linguistic, cultural, kin-based rhetoric.    From Wordnik.com.  [1988, Jan] Reference

Such societies are still kin-based, but power is concentrated in the hands of powerful kin leaders responsible for redistributing food and other commodities through society.    From Wordnik.com.  [f. Subdividing Prehistoric Times] Reference

And, a la Robert Frank, what starts out as emotional incentives to act on behalf of a fairly specified, narrowly defined, and kin-based group gets co-opted and extends irrationally? to larger, less cohesive groups.    From Wordnik.com.  [Archive 2008-02-01] Reference

Emphasizing continuity rather than change, women's life-storytelling reveals their deep involvement in extensive kin-based social networks (consanguineal, affinal, fictive), but places marriage and uterine ties consistently in the narrative foreground.    From Wordnik.com.  [Where Women Make History: Gendered Tellings of Community and Change in Magude, Mozambique] Reference

And even if racism had never been the defining evil of the Confederacy that it very definitely was, any society rooted in this kind of tribal, kin-based identity will immediately start tending towards the fear of dissidents and outsiders which tribalism by nature encourages.    From Wordnik.com.  [Women and the Invisible Fist] Reference

"Hemings 'house is a form that was new to Monticello at the end of the eighteenth century, signaling a shift from large buildings sheltering unrelated people to kin-based housing that afforded enslaved individuals and their families a bit more privacy and control of their domestic environments," says Neiman.    From Wordnik.com.  [Matriarch of Mulberry Row] Reference

The dominance of kin-based interests in politics at all levels.    From Wordnik.com.  [The Guardian World News] Reference

Voluntary groups have been traditionally viewed as supplemental to the kin-based family group which provided the most reliable basis for continued social support.    From Wordnik.com.  [xml's Blinklist.com] Reference

15 In nineteenth-century Afghanistan, many of those who borrowed or sought cash advances through the hundi-based money market had exhausted familial and kin-based economic support and were not fiscally solvent.    From Wordnik.com.  [Connecting Histories in Afghanistan: Market Relations and State Formation on a Colonial Frontier] Reference

This hypothesis asserts that the various psychological mechanisms comprising the human mind (although this applies just as well to our bodies) evolved in and for a long-gone Pleistocene environment - specifically, the African savannah where we lived for ~2. 5 million years in small, kin-based "bands.".    From Wordnik.com.  [Ethical Technology] Reference