There is a grandeur in this view of life...while this planet has gone cycling on according to the fixed law of gravity, from so simple a begining endless forms most beautiful and most wonderful have been, and are being evolved
Charles Darwin
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The New Science of Evo Devo

Sean Carroll’s “THE NEW SCIENCE OF EVO DEVO” ENDLESS FORMS MOST BEAUTIFUL completes the one long argument of Evolution trilogy, starting with the iconic On the Origin of Species, 1859 (Charles Darwin) and the genetic base sequel, Evolution the Modern Synthesis, 1942 (Julian Huxley). The Origin describes evolution through a selective process of favorable traits endowing its possessor a reproductive advantage called natural selection; the Synthesis defines the favorable traits as genes, specifically, Deoxyribonucleic acid, DNA; and, EVO DEVO cogently explicates the molecular mechanics of evolution in terms of genetic tool kits and switches, the simple components imperative to build all organisms. Simply put, there is a tool kit of genes for appendages; the same gene that forms an arm for a human, a wing for a bird, a fin for a fish are one in the same. So, the philosophical question begs to be asked, if there is such simple genetic similarity between all organisms: the euglena and elephant, what evoked the immense diversity of critters. The Holy Grail lies within the switches, which lever the tool kit into operation on when and what to do: molding animal forms into size, shape and colors. ”The new understanding of tool kit genes and genetic switches explains how, from so simple a beginning, the endless forms of nature have evolved.”

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