The Second Replicator

Descendants (at least 19 branches originate here)

• The Second Replicator 🔊

  Replication + Variation + Selection = Evolution

  • is_parent Before Darwin ·

    For most of human history, the diversity of life was explained by one simple idea: species are fixed, created once, unchanging.A rabbit begets a rabbit. An oak
  • is_parent Darwin's Insight ·

    In 1859, Charles Darwin proposed something radical: species are not fixed.They change, slowly, over generations — new species arise from old ones through
  • is_parent The Engine of Evolution ·

    Replication + Variation + Selection = EvolutionDarwin never used these three words this way — but this is the abstract engine hiding inside his argument.T

    ↜ is_linked ← Replicate · Vary · Select
  • is_parent Replication ·

    Something must be copied from one generation to the next.Offspring resemble parents — not perfectly, but closely enough that traits persist.Darwin did not
  • is_parent Variation ·

    No copy is perfect.Within any population, individuals differ — in size, colour, behaviour, shape.Some of this variation is heritable: it gets passed on, i
  • is_parent Selection ·

    Not every variant survives. Not every survivor reproduces equally.Resources are limited; environments are demanding.Whatever traits make an individual slightly
  • is_parent Darwin's Finches ·

    In 1835, Darwin collected small birds across the Galápagos Islands — a few hundred kilometres off the coast of Ecuador.Back in London, ornithologis
  • is_parent One Ancestor, Many Beaks ·

    The beaks matched the food available on each island: hard seeds, soft fruit, insects, nectar.Darwin's explanation: all the finches descended from a single ances
  • is_parent Why Finches Matter ·

    The finches are not proof of evolution by themselves — but they are an unusually clean illustration of the engine in action, isolated on real islands, at
  • is_parent Universal Darwinism ·

    Darwin described biological evolution. But notice: nothing in the three-step engine mentions DNA, cells, or carbon chemistry.It only requires: entities that are

    ↝ is_linked → Oceania (Room 215)
  • is_parent Beyond Carbon ·

    The pattern shows up again and again, once you know to look for it:your immune system selects among antibody variants for the ones that bind an intruder;compute
  • is_parent Dawkins' Reframing ·

    In 1976, Richard Dawkins published The Selfish Gene — and reframed the whole story.It is not organisms that are the true unit of selection, he argued. It
  • is_parent Replicators and Vehicles ·

    Two roles, easy to confuse:Replicator — the thing that gets copied. The gene.Vehicle — the thing that is built, survives, and reproduces, carrying r
  • is_parent A Question Dawkins Asked ·

    If the gene is just one possible kind of replicator……could there be others? Things that are copied, vary, and are selected — but are made of
  • is_parent The Second Replicator ·

    “I think that a new kind of replicator has recently emerged on this very planet… I shall call it a meme.”— Richard Dawkins, The Selfish
  • is_parent Genes and Memes Compared ·

    Gene — replicated via reproduction; vehicle: the body; variation: mutation; selection: survival & reproduction.Meme — replicated via imitation;

    ↜ is_linked ← Five roles in the memetic game
  • is_parent Ideas in Motion ·

    We began with finches on volcanic islands and ended with an idea that may be living, right now, inside each of you.If memes are real replicators, then minds are
  • is_parent The Altruism Puzzle ·

    Nature is full of altruism — vervet monkeys shout alarm calls that draw a predator's attention to themselves, worker bees die defending the hive, parents starve