John Edser wrote:

> 
> GH:-
> If a view includes multiple "additive fitness interfaces", how can you
> decide which is first?  Is it the interface of the smallest particles?  Is
> it the interface that is thought to have manifested first in the history of
> life?
> 
> JE:-
> Logically, within any supposed
> fitness multi level, one level
> and just one level only, can
> be FIRSTLY additive in fitness
> to the next level above itself.

I've never been able to understand John myself, but I suspect one of
the best books on multilevel selection is Laurent Keller's 'Multilevel
Selection in Evolution'.

PR
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