?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adc&rft.title=A+simple+model+of+unbounded+evolutionary+versatility+as+a+largest-scale+trend+in+organismal+evolution&rft.creator=Turney%2C+Peter&rft.subject=Evolution&rft.subject=Theoretical+Biology&rft.description=The+idea+that+there+are+any+large-scale+trends+in+the+evolution+of+biological+organisms+is+highly+controversial.+It+is+commonly+believed%2C+for+example%2C+that+there+is+a+large-scale+trend+in+evolution+towards+increasing+complexity%2C+but+empirical+and+theoretical+arguments+undermine+this+belief.+Natural+selection+results+in+organisms+that+are+well+adapted+to+their+local+environments%2C+but+it+is+not+clear+how+local+adaptation+can+produce+a+global+trend.+In+this+paper%2C+I+present+a+simple+computational+model%2C+in+which+local+adaptation+to+a+randomly+changing+environment+results+in+a+global+trend+towards+increasing+evolutionary+versatility.+In+this+model%2C+for+evolutionary+versatility+to+increase+without+bound%2C+the+environment+must+be+highly+dynamic.+The+model+also+shows+that+unbounded+evolutionary+versatility+implies+an+accelerating+evolutionary+pace.+I+believe+that+unbounded+increase+in+evolutionary+versatility+is+a+large-scale+trend+in+evolution.+I+discuss+some+of+the+testable+predictions+about+organismal+evolution+that+are+suggested+by+the+model.+&rft.publisher=MIT+Press&rft.date=2000&rft.type=Journal+(Paginated)&rft.type=PeerReviewed&rft.format=application%2Fpostscript&rft.identifier=http%3A%2F%2Fcogprints.org%2F1799%2F1%2FALife2000.ps&rft.format=application%2Fpdf&rft.identifier=http%3A%2F%2Fcogprints.org%2F1799%2F5%2FALife2000.pdf&rft.identifier=++Turney%2C+Peter++(2000)+A+simple+model+of+unbounded+evolutionary+versatility+as+a+largest-scale+trend+in+organismal+evolution.++%5BJournal+(Paginated)%5D+++++&rft.relation=http%3A%2F%2Fcogprints.org%2F1799%2F