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All scientists agree that evolution has occurred-that all life comes from a common ancestry, that there has been extinction, and that new taxa, new biological groups, have arisen. the question is, is natural selection enough to explain evolution? is it the driver of evolution?
-Lynn Margulis
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All Scientists Agree That Evolution Has Occurred-that

Lynn Margulis
All scientists agree that evolution has occurred-that all life comes from a common ancestry, that there has been extinction, and that new taxa, new biological groups, have arisen. the question is, is natural selection enough to explain evolution? is it the driver of evolution?
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Groups Extinction Ancestry

More From Lynn Margulis

Natural selection is not evolution. yet, ever since the two words have been in common use, the theory of natural selection has been employed as a convenient abbreviation for the theory of evolution by means of natural selection, put forward by darwin and wallace. this has had the unfortunate consequence that the theory of natural selection itself has scarcely ever, if ever, received separate consideration.
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You can be a thorough-going neo-darwinian without imagination, metaphysics, poetry, conscience, or decency. for 'natural selection' has no moral significance: it deals with that part of evolution which has no purpose, no intelligence, and might more appropriately be called accidental selection, or better still, unnatural selection, since nothing is more unnatural than an accident. if it could be proved that the whole universe had been produced by such selection, only fools and rascals could bear to live.
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We are inescapably the result of a long heritage of learning, adaptation, mutation and evolution, the product of a history which predates our birth as a biological species and stretches back over many thousand millennia... going further back, we share a common ancestry with our fellow primates; and going still further back, we share a common ancestry with all other living creatures and plants down to the simplest microbe. the further back we go, the greater the difference from external appearances and behavior patterns which we observe today.
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We have a common enemy. we have this in common: we have a common oppressor, a common exploiter, and a common discriminator. but once we all realize that we have this common enemy, then we unite on the basis of what we have in common. and what we have foremost in common is that enemy - the white man. he's an enemy to all of us. i know some of you all think that some of them aren't enemies. time will tell.
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An engineer can look at the data, but he needs a translator from the cockpit - the driver - to understand it completely. for example, only the driver can tell you why he abruptly takes his foot off the gas pedal at a certain point. the data doesn't necessarily tell the engineer whether the driver made a mistake at that point or the car was acting up. the information the driver provides often helps determine the direction of development.
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A complete theory of evolution must acknowledge a balance between "external" forces of environment imposing selection for local adaptation and "internal" forces representing constraints of inheritance and development. vavilov placed too much emphasis on internal constraints and downgraded the power of selection. but western darwinians have erred equally in practically ignoring (while acknowledging in theory) the limits placed on selection by structure and development what vavilov and the older biologists would have called "laws of form.
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