The Structure of Evolutionary Theory

Seeds of Hierarchy 225 But at that time [after the Malthusian insight of 1838 and his composition of the sketches of 1842 and 18 ...

226 THE STRUCTURE OF EVOLUTIONARY THEORY taxa. So much of what Darwin needed to explain—plenitude in ecology, branching models i ...

Seeds of Hierarchy 227 for sorting and selection at the species level—and Darwin, with characteristic honesty, faced his distres ...

228 THE STRUCTURE OF EVOLUTIONARY THEORY The operation of natural selection at the organismal level, powered by the Malthusian ...

Seeds of Hierarchy 229 Darwin did not draw this unique diagram simply to illustrate the generality of evolutionary branching, bu ...

230 THE STRUCTURE OF EVOLUTIONARY THEORY of the same order; the surface of the island would no doubt be pretty well clothed with ...

Seeds of Hierarchy 231 of their principle): The advantage of diversification in the inhabitants of the same region is, in fact, ...

232 THE STRUCTURE OF EVOLUTIONARY THEORY description of diversity, but emphatically not a "principle of divergence." Darwin's in ...

Seeds of Hierarchy 233 as unfettered individual competition yields the best social order in Adam Smith's world, so too will natu ...

234 THE STRUCTURE OF EVOLUTIONARY THEORY DIVERGENCE AS A CONSEQUENCE OF NATURAL SELECTION In Chapter 2,1 noted the radical chara ...

Seeds of Hierarchy 235 So Darwin recognized in early 1855 that maximization would have to be explained by natural selection (a " ...

236 THE STRUCTURE OF EVOLUTIONARY THEORY Parental forms will then tend to succumb because natural selection favors their extreme ...

Seeds of Hierarchy 237 of his theory as a consequence of ordinary natural selection at the organismic level? I have proceeded in ...

238 THE STRUCTURE OF EVOLUTIONARY THEORY levels, though he does not provide the technical arguments detailed below. In Schweber' ...

Seeds of Hierarchy 239 imply and grade into the other; the two levels could represent alternate solutions of the Necker cube (se ...

240 THE STRUCTURE OF EVOLUTIONARY THEORY more diversified in habits and structure the descendants of our carnivorous animals bec ...

Seeds of Hierarchy 241 or breaking point, for extrapolationist theories that seek the causes of macroevolution in microevolution ...

242 THE STRUCTURA OF EVOLUTIONARY THEORY ...

Seeds of Hierarchy 243 3 - 6. The expanded version of Darwin's figure, drawn in preparation for the long version, Natural Select ...

244 THE STRUCTURE OF EVOLUTIONARY THEORY (the lower half of Fig. 3-6), where variation to the left and right of A represents gre ...