"Elie Gendloff"  wrote in message 
news:cjntlg$1mbn$1{at}darwin.ediacara.org...
> Could altuism be not necessarily advantageous, but is "carried along"
> or inseperable from another trait, such as the ability to plan ahead,
> or something else?  To use a loose analogy, the sickle cell trait is
> inseperable from malaria resistance, so it continues.

Sickle-cell anemia IS the malaria resistence trait.
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