Spears_Lecture5

Spears_Lecture5 - 1 Lecture 5 Sociality from ‘selFsh’...

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Unformatted text preview: 1 Lecture 5 Sociality : from ‘selFsh’ genes to complex societies Recall from last lecture: the pinnacle of social complexity (the social insects) WHY/HOW do complex animal societies arise? 2 A unifying theory focused on GENES • Only the genes of successful reproducers “outlive” the individual via their offspring (grandparents → parents → children, etc.). • Individual Ftness = total number of surviving offspring produced in lifetime (i.e., how many genes get passed on). • Your ancestors must have been ‘Ft’ (i.e., they passed their genes on to you!) • Centrality of genes self-evident. SO WHAT ARE GENES? DNA REPLICATION 3 The Selfsh Gene Concept* • A principle property oF DNA - it replicates ! • So, a DNA gene is a ‘selfsh’ entity (it “wants” to get itselF “replicated” over & over). • But a gene doesn’t exist in isolation: • Genes build individuals & it is the individual who reproduces (i.e., passes on more oF its genes). • High individual ftness thereFore benefts genes - the individual dies, but genes live on in oFFspring. • “ We are survival robots, programmed to preserve the selfsh molecules known as genes .” Richard Dawkins* Selfsh Genes to Complex Societies • Selfsh genes “ cooperate as a team” to build individuals....
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Spears_Lecture5 - 1 Lecture 5 Sociality from ‘selFsh’...

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