The evolution of an idea

Introduction: an age of enlightenment and evolution

The organization man

Big thinking with Buffon

The life of the lunaticks

Lamarck and Cuvier: think oil and water

Watch out for giants

Erasmus's grandson

Aboard the Beagle: five years at sea

Darwin's big idea

The other guy

Three papers and an entangled bank

Mendel minding peas

Treading a primrose path

Looking ahead.